How to spell unsure

Unsure is spelled U-N-S-U-R-E.

hear itun·sure/ənʃ'ʊr/adjectivePrefixes and work

What it means: Not feeling certain or confident about something.

In a sentence: Mark was unsure if he wanted to ride the roller coaster.

Same family: sure, surely, unsurely, assure, reassure. If you can spell one, the shared part carries to the others.

Where it comes from: “Unsure” is formed by adding the Old English prefix “un-,” meaning “not,” to “sure,” which came into English from Latin via French. Together they literally mean “not sure,” a pattern used in many English adjectives like “unhappy” and “unfair.”

Try spelling it

You will hear the word and a sentence. Type it and press Enter. Then four more words from the same level, so you know where you stand.

Words like this

nursery · long-term · occurrence · unsafe · undo · unlock · unkind · uncover

Everyone has words they always get wrong. Spelling.School finds yours, shows you exactly why you miss them, and uses spaced repetition until you spell them right every time. Five minutes a day. Try five words without signing up.