unsure

Từ điển Oxford Advanced Learner 8th

un·sure [unsure] BrE [ˌʌnˈʃʊə(r)] BrE [ˌʌnˈʃɔː(r)] NAmE [ˌʌnˈʃʊr] adjective not before noun
1. not certain of sth; having doubts
•~ about/of sth There were a lot of things I was unsure about.
•~ how, what, etc… I was unsure how to reply to this question.
•~ of/as to how, what, etc… He was unsure of what to do next.
•They were unsure as to what the next move should be.
2. ~ (of yourself) lacking confidence in yourself
•Like many women, deep down she was unsure of herself.
Opp: ↑sure

Example Bank:
•I felt a bit unsure about him.
•If you're still unsure about what you are supposed to do, speak up!
•She was rather unsure of her reception.
•We were unsure as to what to do next.

• Từ đồng nghĩa / Synonyms:
  uncertain, incertain, diffident, shy, timid
• Từ trái nghĩa / Antonyms:
  certain(p), sure, confident