His manner was self-assured and brusque.

他的举止自负而且粗鲁。

《柯林斯英汉双解大词典》

So saying, he took a long and luxurious draw on his cigar and, in that confident, assured manner he has cultivated, lapsed into a coughing fit so violent I thought he would hemorrhage.

说完，他享受地深吸一口雪茄，并以培养出来的自信和心里有数的姿态一阵咳嗽，厉害得我以为他会内出血。

youdao

The Anfield club's manager Roy Hodgson had picked the same starting XI which beat Chelsea and his side began in the assured manner the confidence of their recent revival had given them.

BBC: Fernando Torres puts Liverpool ahead at Wigan