形容词确信的，深信的; 有信心的，沉着的; 大胆的，过分自信的; 厚颜无耻的

名词知己; 心腹朋友

1. 坚信的;有信心的
If you are confident about something, you are certain that it will happen in the way you want it to.

e.g. I am confident that everything will come out right in time...
我坚信一切终究都会好起来。
e.g. Mr Ryan is confident of success...
瑞安先生坚信一定会成功。

形容词狡猾的; 微妙的; （形势、工作等）复杂的; 机警的

1. 难办的;难对付的;棘手的
If you describe a task or problem as tricky, you mean that it is difficult to do or deal with.

e.g. Parking can be tricky in the town centre...
在市中心泊车可能很困难。
e.g. It's a very tricky problem, but I think there are a number of things you can do.
那是个非常棘手的问题，但我想有几样事你是可以做到的。

2. 诡计多端的;奸诈的;狡猾的
If you describe a person as tricky, you mean that they are likely to deceive you or cheat you.