自信 じしん満々 まんまん
jishimmamman

na-Adjective
no-Adjective
To-Adverb

1. full of confidence; brimming with (self-)confidence; having great faith in oneself

かれ てると自信 じしん満々 まんまんだ。
karewa kateruto jishimmammanda.
He flatters himself he will win.
Other forms: