un·sure/ʌn`ʃr; ˌʌnˈʃʊə◄/ adj 1 not certain about something or about what you have to do 没有把握的，不肯定的: At first, he was unsure about accepting the job. 起初，他无法肯定是否接受那份工作。 2 unsure of yourself lacking confidence 缺乏信心的: Clara seemed shy and unsure of herself. 克莱尔似乎既害羞又缺乏自信。