/ˌʌnˈʃɔ:(r); US -ˈʃʊər ||; ʌnˈʃυr/adj1 unsure of yourself not feeling confident about yourself 缺乏自信: He's young and still quite unsure of himself. 他还年轻，仍然缺乏自信。
2 unsure (about/of sth) not certain; having doubts 不肯定；存疑: I didn't argue because I was unsure of the facts. 我没有争辩，因为我对事实没有把握。 [OPP] sure or certain 反义词为sure或certain