confidence

她有才能，但缺乏自信。

She has ability but she lacks ___confidence.

凯特刚做这份工作，但我对她充满信心。

Kate's new to the job, but I've got every ___confidence in her.

他技术非常娴熟，但有时仍然缺乏自信。

He is very skilled, but sometimes he still lacks ___confidence.