self-assured

US /ˌself əˈʃʊrd/
UK /ˌself əˈʃʊrd/
"self-assured" picture
1.

自信的, 有把握的

confident in one's own abilities or character

:
She walked into the room with a self-assured smile.
她带着自信的笑容走进房间。
His calm and self-assured demeanor impressed everyone.
他沉着自信的举止给每个人留下了深刻印象。