unsure

1. ADJ If you are unsure of yourself, you lack confidence. 缺乏信心的

The evening show was terrible, with hesitant unsure performances from all. 晚上的演出很糟糕, 所有人的表演都犹豫不决，缺乏信心。

2. ADJ If you are unsure about something, you feel uncertain about it. 无把握的[v-link ADJ]

Fifty-two percent were unsure about the idea. 52%的人对这个想法都没有把握。