adj.过分自信的，自高自大的，自以为是的

I'm cocksure about my abilities in this field, so I'm confident to take on any challenges.
我对自己的能力在这一领域很有信心，所以我很自信地接受任何挑战。
The young man was cocksure and thought he could handle anything that came his way.
这个年轻人自以为是，认为自己能应对任何事情。
Despite her lack of experience, she was still cocksure and believed she could succeed.
尽管她缺乏经验，但她仍然很自信，相信自己能成功。
His cocksure attitude made everyone around him feel uncomfortable.
他的自以为是的态度让周围的人都感到不舒服。
She was always cocksure when she spoke, as if she knew everything.
她说话时总是显得很自信，仿佛她知道所有的事情。
The boxer entered the ring with a cocksure grin, ready for the fight.
拳击手带着自信的笑容进入拳台，准备战斗。
His cocksure smile suggested he was overconfident, but it didn't fool anyone.
他那自信的微笑表明他过于自信，但这并没有骗过任何人。
Despite the criticism, she remained cocksure about her fashion choices.
尽管受到了批评，她仍然对自己的时尚选择充满自信。
The CEO walked into the meeting room with a cocksure air, confident in his presentation.
董事长自信地走进会议室，对他的演讲充满信心。
He was always cocksure about winning, even when the odds were against him.
他总是在自信于胜利，即使胜算不大。