'confident'はこちらの項目にも見つかりました。
英語の見出し語に対する説明:
assertive
- assuredness
- bet
- brittle
- certain
- cocksure
- cocky
- diffidently
- discouraged
- hesitant
- lose your self-assurance
- optimistic
- self-assertion
- self-assured
- sure
- surefooted
- trust
- up on