| Word | Definitions | Synonyms |
|---|---|---|
| sincerely | (adverb) with sincerity; without pretense | Synonyms: truly, unfeignedly |
| (adverb) written formula for ending a letter | Synonyms: sincerely yours | |
| singly | (adverb) one by one; one at a time | - |
| (adverb) apart from others | Synonyms: individually, on an individual basis, one by one, separately, severally | |
| singularly | (adverb) in a singular manner or to a singular degree | - |
| sinuously | (adverb) in a sinuous manner | - |
| sinusoidally | (adverb) in a sinusoidal manner | - |