I am most unhappy at his boastfulness.

我对他的大言不惭很不高兴.

Beijing, Bangkok and Bangalore: beware boastfulness

北京、曼谷、班加罗尔：谨防自大

Modesty will win warm support; boastfulness will be cold shouldered.

谦虚的工作者常易取得热情的支持，浮夸的工作者则常受到冷淡的对待。

There is the same swagger and boastfulness running through the whole of the speeches.

这种不可一世、惟我独尊的口气贯穿了他的所有演讲.

I would not suggest that anyone move beyond feeling confident into arrogance or boastfulness.

我并非建议大家过分自信以致傲慢或自负。