From Longman Dictionary of Contemporary Englishunsureun‧sure /ˌʌnˈʃɔː◂ $ -ˈʃʊr◂/ ●○○ adjective 1 NOT SUREnot certain about something or about what you have to dounsure of/about I was unsure of the reaction I would get. If you are unsure about anything, just ask.unsure whether/what etc Peter was unsure what to do next.2 → unsure of yourself
Examples from the Corpus
unsure• Mr Fallon said about 3,000 of 26,000 people he had canvassed were still unsure how they would vote tomorrow.• Flynn got all the really difficult contracts, or the ones John was unsure of being able to visit regularly.• She also looked very young and unsure of herself, but Kate knew that was just an illusion.• Boldwood realized they had noticed him, and suddenly felt unsure of himself.• He moves slowly back, unsure of the reason behind my sudden outburst.• Instead, they are weak and unsure of themselves.• I stopped dead in my tracks, unsure of what to do next.• Only 11 percent of the Republican voters said they were unsure who they will support for the nomination two months from now.unsure whether/what etc• Dellaverson said she was unsure whether Avis would appeal the decision to the state Supreme Court.• Cindy reluctantly revealed that often she was unsure whether he delighted more in seeing the spoon or her face.• Lucien was unsure what Mandru meant by these remarks.• In that house of women I was unsure what my role should be with Clarisa.• He pushed open the driver's side door and clambered out, unsure whether to approach the Montego or wait.• Business leaders were also unsure what to expect.• Ask at your council or local advice group if you are unsure what you can claim. 