Adverbs That Start With S (Common, Positive & Six Letters Adverbs)
S-adverbs make your sentences more natural, descriptive, and precise — a small change in wording that adds a lot of clarity.
Adverbs that start with S are simply words beginning with the letter S that modify a verb, an adjective, another adverb, or even a whole sentence.
You’ll recognise most of them right away. Common examples include slowly, suddenly, silently, seldom, and surely — each one changing how, when, or how often something happens.
Quick Challenge
Choose the correct S-adverb to complete the sentence:
The baby was sleeping __________, so everyone whispered.
✅ Answer: B. silently
Silently describes how everyone whispered to avoid making noise while the baby was sleeping. The other options don’t fit the meaning of the sentence.
Common Adverbs That Start with S
S is one of the richest letters for adverbs. These twenty turn up constantly in conversation, school writing, and news reporting, and between them they cover manner, time, frequency, and degree.
| Adverb | Example Sentence |
|---|---|
| safely | The children crossed the road safely. |
| secretly | The children secretly planned a surprise party. |
| seldom | He seldom forgets his homework. |
| separately | Pack the fragile items separately. |
| seriously | Please take these instructions seriously. |
| silently | The audience listened silently during the speech. |
| simply | She simply smiled and nodded. |
| slowly | The turtle moved slowly across the path. |
| smoothly | The presentation went smoothly. |
| softly | She spoke softly to the frightened child. |
| sometimes | We sometimes eat dinner outside. |
| soon | The train will arrive soon. |
| steadily | Sales increased steadily throughout the year. |
| straight | Drive straight until you reach the traffic lights. |
| strangely | The machine behaved strangely this morning. |
| strictly | The rules are strictly enforced. |
| strongly | I strongly support the new policy. |
| successfully | They successfully completed the project. |
| suddenly | It suddenly started to rain. |
| surely | You will surely enjoy this book. |
Two Things Worth Noticing
- Straight is the one word in the table with no -ly ending, and it doesn’t take one. Straightly isn’t English — say drive straight on or he answered straight away.
- Seldom is a frequency adverb like often and never, so it sits before the main verb: He seldom forgets, not He forgets seldom.
Positive Adverbs That Start with S
These S-adverbs carry approval. They’re the words you want in a reference letter, a thank-you note, or any description of someone doing something well.
| Adverb | Example Sentence |
|---|---|
| safely | Everyone arrived home safely after the trip. |
| securely | The climbers were securely attached to the ropes. |
| selflessly | The volunteers worked selflessly to help the community. |
| sensibly | She sensibly saved part of her salary every month. |
| serenely | She serenely watched the sunset over the lake. |
| sincerely | He sincerely thanked everyone for their support. |
| skillfully | She skillfully solved the difficult puzzle. (British spelling: skilfully) |
| smartly | He was smartly dressed for the interview. |
| smoothly | The software update installed smoothly. |
| sociably | The new student mixed sociably with the class. |
| sparingly | Use the seasoning sparingly for the best flavor. |
| spectacularly | The fireworks ended spectacularly. |
| splendidly | The students performed splendidly in the competition. |
| steadfastly | They steadfastly defended their beliefs. |
| successfully | The athlete recovered successfully after surgery. |
| sufficiently | The room was sufficiently bright for reading. |
| supportively | Her teammates listened supportively during the meeting. |
| surely | Success will surely come with persistence. |
| sweetly | The little girl smiled sweetly at her grandmother. |
| systematically | The researcher systematically recorded every observation. |
Why Four Words Appear Twice
Safely, smoothly, successfully, and surely sit in both tables, with different sentences each time. That isn’t an oversight — a word can be an everyday adverb and a complimentary one at the same time.
Tone often comes from the sentence rather than the word. The meeting went smoothly is praise; the coin slid smoothly into the gap is just description.
Complete List of Adverbs That Start with S
For quick reference, here is a fuller list of S-adverbs, including some you’ll see more often in advanced reading and writing.
- sacrilegiously
- sadly
- saintly
- salaciously
- salubriously
- sanctimoniously
- sapiently
- sarcastically
- satirically
- satisfactorily
- scantily
- scarcely
- scathingly
- schematically
- scientifically
- scrupulously
- searchingly
- seasonally
- secondarily
- secondly
- sedately
- seductively
- seemingly
- self-consciously
- selfishly
- self-confidently
- self-critically
- self-reliantly
- self-righteously
- self-assuredly
- semantically
- semiannually
- semicircularly
- sentimentally
- sequentially
- seriously
- serviceably
- sexually
- shabbily
- shakily
- shamefacedly
- shamefully
- sharply
- sheepishly
- shrilly
- shrewdly
- shiveringly
- shockingly
- shortly
- showily
- shrewishly
- shyly
- sickeningly
- sideways
- signally
- significantly
- silently
- similarly
- simplistically
- simultaneously
- singularly
- skeptically
- skillfully
- sleepily
- sleeplessly
- slenderly
- slickly
- slightly
- sloppily
- sluggishly
- slyly
- small
- smartly
- smilingly
- smugly
- sneakily
- snugly
- soberly
- socially
- sociably
- solemnly
- solicitously
- solidly
- solo
- soothingly
- sordidly
- sorrowfully
- soundly
- sourly
- sparingly
- spatially
- specifically
- spectacularly
- speedily
- spiritually
- spitefully
- spontaneously
- sporadically
- sportingly
- sprightly
- squarely
- stabilizingly
- staunchly
- statistically
- steadfastly
- stealthily
- sternly
- stiffly
- stimulatingly
- stingily
- stoically
- straightforwardly
- strategically
- strenuously
- stressfully
- stringently
- structurally
- studiously
- stunningly
- submissively
- subconsciously
- subjectively
- subsequently
- substantially
- subtly
- successfully
- successively
- sufficiently
- suggestively
- suitably
- sulkily
- superbly
- superficially
- superstitiously
- supremely
- surprisingly
- suspiciously
- sustainably
- swaggeringly
- swiftly
- symbolically
- sympathetically
- synchronously
- syntactically
Six-Letter Adverbs That Start with S
If you’re looking for shorter, easy-to-use S-adverbs, this compact set is a good place to start.
| Adverb | Example Sentence |
|---|---|
| safely | Always drive safely in bad weather. |
| seldom | We seldom watch television on weekdays. |
| softly | The wind blew softly through the trees. |
| simply | She simply smiled and walked away. |
| surely | You will surely recognize him. |
| slowly | The snail moved slowly across the garden. |
| smartly | He was smartly dressed for the ceremony. |
| soundly | The baby slept soundly all night. |
| squarely | She squarely faced the challenge. |
| snugly | The blanket fit snugly around the baby. |
| sorely | The team sorely missed its captain. |
| shrewdly | The investor shrewdly chose the right company. |
| sourly | He smiled sourly after the loss. |
| starkly | The two opinions differed starkly. |
| stiffly | He walked stiffly after the long hike. |
| sweetly | The child sang sweetly before the audience. |
| shyly | She shyly introduced herself to the class. |
Descriptive Adverbs That Start with S
These S-adverbs add vivid detail to writing, painting a clearer picture of how something happens.
- safely
- silently
- slowly
- softly
- smoothly
- steadily
- sharply
- sweetly
- strangely
- sternly
- stiffly
- shrewdly
- suddenly
- sparingly
- spectacularly
- sincerely
- skillfully
- smartly
- solemnly
- soothingly
- sorrowfully
- suspiciously
- successfully
- suitably
- superbly
- swiftly
- subtly
- strategically
- steadfastly
- squarely
- sleepily
- smilingly
- sneakily
- snugly
- socially
- sympathetically
Adverbs That Start with S to Describe a Person
These S-adverbs are handy when you want to describe how someone acts, speaks, or carries themselves.
- sincerely
- skillfully
- smartly
- sweetly
- softly
- solemnly
- shrewdly
- shyly
- steadily
- sympathetically
- selflessly
- sensibly
- steadfastly
- strategically
- suspiciously
- sternly
- smugly
- socially
- sociably
- sparingly
- successfully
- suitably
- superbly
- smoothly
- seriously
- selfishly
- self-confidently
- self-reliantly
- self-consciously
- sarcastically
- saintly
- swaggeringly
- sheepishly
Common Mistakes When Using S-Adverbs
Here are some common mistakes English learners make when using adverbs that start with S and how to correct them.
-
1. Using an Adjective Instead of an Adverb
✗ She sings soft.
✓ She sings softly.
Why? Soft is an adjective, while softly is the adverb that describes how she sings.
-
2. Confusing Sure and Surely
✗ I will sure finish the project today.
✓ I will surely finish the project today.
Why? Sure is an adjective. Surely is the adverb used to modify the verb finish.
-
3. Mixing Up Sometime and Sometimes
✗ We go hiking sometime on weekends.
✓ We go hiking sometimes on weekends.
Why? Sometimes means occasionally. Sometime refers to an unspecified time.
-
4. Using Slow Instead of Slowly
✗ Please drive slow.
✓ Please drive slowly.
Why? Slowly is the standard adverb describing how someone drives.
-
5. Using Sudden Instead of Suddenly
✗ The lights went out sudden.
✓ The lights went out suddenly.
Why? Sudden is an adjective, while suddenly modifies the verb went out.
-
6. Confusing Special and Especially
✗ I like fruit, special mangoes.
✓ I like fruit, especially mangoes.
Why? Especially means particularly and is the correct adverb in this sentence.
-
7. Wrong Word Order with an Adverb
✗ She speaks always politely.
✓ She always speaks politely.
Why? Frequency adverbs such as always, sometimes, and seldom usually come before the main verb.
-
8. Using Seldom with Double Negatives
✗ He doesn’t seldom arrive late.
✓ He seldom arrives late.
Why? Seldom already has a negative meaning (“not often”), so another negative is unnecessary.
-
9. Confusing Straight and Straightly
✗ Walk straightly to the station.
✓ Walk straight to the station.
Why? Straight commonly functions as an adverb in English. Straightly is rare and generally not used in everyday English.
-
10. Forgetting the Comma After a Sentence Adverb
✗ Surprisingly nobody complained.
✓ Surprisingly, nobody complained.
Why? When sentence adverbs such as Surprisingly, Surely, or Sadly begin a sentence, they are usually followed by a comma.
Practice Exercises
Exercise 1: Fill in the Blanks
Complete each sentence with the most suitable S-adverb. Each word is used once.
- Word bank
- slowly
- silently
- safely
- suddenly
- sincerely
- seldom
- smoothly
- surely
-
The baby slept through the night.
-
Please drive during the storm.
-
The lights went out.
-
She thanked everyone for their help.
-
We eat fast food.
-
The meeting ended without any problems.
-
The students entered the library .
-
You will enjoy this interesting book.
Exercise 2: Choose the Correct Adverb
Tap the correct answer for each sentence.
-
The turtle walked __________.
-
He thanked his teacher __________.
-
The children crossed the street __________.
-
We __________ visit that museum because it is far away.
-
The performance ended __________ with loud applause.
Exercise 3: Identify the S-Adverb
Find the S-adverb in each sentence, then check the answer key.
- She softly closed the door.
- They steadily improved their grades.
- We sometimes visit our grandparents.
- The athlete finished successfully.
- He smartly answered every question.
Exercise 4: Rewrite the Sentence
Replace the highlighted words with a suitable S-adverb.
- She spoke in a quiet way.
- They completed the task without problems.
- The children walked without making noise.
- He answered in an honest way.
- The car moved at a low speed.
Exercise 5: Write Your Own Sentences
Write one sentence using each of these S-adverbs:
- safely
- slowly
- sincerely
- suddenly
- successfully
Show the answer key
Exercise 1: Fill in the Blanks
- safely
- slowly
- suddenly
- sincerely
- seldom
- smoothly
- silently
- surely
Exercise 2: Choose the Correct Adverb
- B. slowly
- A. sincerely
- A. safely
- B. seldom
- A. spectacularly
Exercise 3: Identify the S-Adverb
- softly
- steadily
- sometimes
- successfully
- smartly
Exercise 4: Rewrite the Sentence (sample answers)
- She spoke softly.
- They completed the task smoothly.
- The children walked silently.
- He answered sincerely.
- The car moved slowly.
Frequently Asked Questions
What are adverbs that start with S?
Adverbs that start with S are words beginning with the letter S that modify verbs, adjectives, other adverbs, or entire sentences. Examples include safely, seldom, silently, slowly, and suddenly.
What are the most common S-adverbs?
Some of the most frequently used are safely, seldom, seriously, silently, simply, slowly, sometimes, soon, suddenly, and surely.
Which S-adverbs describe how an action is performed?
Common S-adverbs of manner include silently, sincerely, skillfully, slowly, smartly, smoothly, softly, and swiftly.
Which S-adverbs express frequency?
Sometimes and seldom are the two everyday ones. Both tell you how often an action happens, and both sit before the main verb.
Is “soon” an adverb?
Yes. Soon is an adverb of time — it tells you when something will happen.
Example: The bus will arrive soon.
Is “slow” the same as “slowly”?
No. Slow is usually an adjective, while slowly is the adverb that describes a verb.
Adjective: The turtle is slow.
Adverb: The turtle moves slowly.
Is “surely” an adverb?
Yes. Surely expresses certainty or confidence.
Example: She will surely pass the exam.
Which S-adverbs are suitable for formal writing?
Formal writing often uses specifically, statistically, strategically, subsequently, sufficiently, and systematically, because each one makes an idea more precise.
How can I learn S-adverbs more quickly?
Read them in context, group them by meaning — time, manner, frequency, degree, or place — write your own sentences with them, and review the list regularly.
Are all S-words ending in “-ly” adverbs?
No. Many are, such as softly and slowly, but the ending settles nothing on its own. Friendly, scholarly, and silly all end in -ly and are adjectives.
Why should I learn adverbs that start with S?
S-adverbs improve your vocabulary, help your writing sound more natural, and let you describe actions, timing, frequency, and emphasis more accurately in everyday English.
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