shamelessly self-assured极为厚颜无耻
Confidence and self-assured有自信
rich and self-assured财大气粗
self-assured or supercilious虽然有人在旁边
Am I the self-assured gentleman我是个自信的绅士
self-assured self-trust自信的
self-assured self-confident有自信的
ADJ（形容词） Someone who is self-assured shows confidence in what they say and do because they are sure of their own abilities. 自信的
He's a self-assured, confident negotiator.
他是个胸有成竹、很有信心的谈判者。