confidence/ 'kɔnfɪdns /

1.noun [u] 
(faith) 信赖

2.noun [u] 
(self-assurance) 自信

3.noun [c] 
(secret) 秘密

to have (every) confidence in sb/sth
对某人/某事(很)有信心
to have (every) confidence that...
对…(很)有信心
to take sb into one's confidence
把某人作为知心人
in confidence
 [speak,say,write etc+] 秘密地