Foundation level · Year 4 · free
uncertain
adjective · Say it: un-SUR-tun
What it means
Foundationnot sure or not known for definite
Amelia was uncertain which answer was right, so she checked her working again.
Similar and opposite words
Synonyms (similar meaning)
- doubtful
- undecided
- unsure
Antonyms (opposite meaning)
- certain
- definite
- sure
More examples
- The weather looked uncertain, so Mum packed both sun cream and umbrellas for the beach.
Where the word comes from
It is made from 'un-' meaning not and 'certain', from Latin 'certus' meaning sure.
Try a quick question
One question about “uncertain”, the way 11+ papers ask it (Foundation level).