timidity

她的羞怯让她在会议上不敢发言。

Her ___timidity kept her from speaking up during the meeting.

他的胆怯让他在班级讨论中总是保持沉默。

His ___timidity made him stay silent during class discussions.

他的胆怯使他不敢在众人面前表达自己的意见。

His ___timidity kept him from voicing his opinion in front of the crowd.