Sine

4 lettersnounmoderate

Updated June 2026

Definition

A trigonometric function that, for a given angle in a right-angled triangle, equals the ratio of the length of the opposite side to the length of the hypotenuse.

“The sine of 30 degrees is exactly 0.5.”

Pronunciation

IPA

/saɪn/

Syllables

si·ne

Related Words

Synonyms

sin

Antonyms

cosine

Word Game Tips

🟩

Wordle

Ends in E with three vowels among four letters, a vowel-rich word ideal for early Wordle elimination.

🔤

Scrabble

Worth 4 points, SINES hooks neatly and it frequently appears in Scrabble racks due to common tiles.

Words Related to Sine

Words one letter different

Change a single letter of “sine” to make these 4-letter words — useful for Wordle and crossword clues.

aine bine cine dine fine hine line mine nine pine side sing sink site size wine

Add a letter to make a longer word

5-letter words you can spell by adding one letter to “sine”.

anise besin biens bines cines denis dines elsin eosin eshin fines hsien insea insee insep inset insue kines lenis liens lines miens mines neifs

Longer words starting with Sine

Words that begin with “sine”.

sines sinew sinews sinewy

Explore Similar Words

4-letter words starting with S 4-letter words ending with E All 4-letter words 5-letter words All word lists

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Dictionary References

Look up sine in an authoritative dictionary for full definitions, pronunciation, and etymology.

Cambridge Dictionary Merriam-Webster

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