diffident
adj. 无自信的；客客气气的；羞怯的
副词：diffidently
近义词：shy，timid，insecure，hesitant，retiring，verecund，coy，timorous，abashed，bashful，sheepish，shrinking，fainthearted，faint-hearted，reluctant，demure，unassertive，modest，unsocial，self-conscious，unassuming，fearful，unsure，reticent，reserved，unobtrusive，self-effacing，quiet，oneself，a，of，shell，in，confident，
英英释义
Adjective
- showing modest reserve;
"she was diffident when offering a comment on the professor's lecture"
- lacking self-confidence;
"stood in the doorway diffident and abashed" "problems that call for bold not timid responses" "a very unsure young man"
例句
用作形容词(adj.)
- He was too diffident to express his opinion.他太不自信，不敢发表自己的见解。
- She is diffident about expressing her opinions.她怯于表述自己的意见。
- He has a politely diffident manner.他的态度是客气中带有羞怯。