diffident [ˈdɪfɪdənt]

以下由轻松背单词网站提供

adj.无自信的，客客气气的，羞怯的

shy and not confident of your abilities

He has a politely diffident manner.他的态度是客气中带有羞怯。
He felt a little diffident about asking concerning her success.他感到有点胆怯，不敢问她是否成功了。