1. He may be conceited, illmannered,
    他也许骄傲自满, 不懂礼貌, 自以为是或愚昧荒唐,

2. He may be conceited, illmannered, presumptuous.
    他也许骄傲自满, 不懂礼貌, 自以为是.

3. He may be conceited, ill-mannered, presumptuous or fatuous,
    这些年轻人也许狂妄自负，举止无理，傲慢放肆，愚昧无知，

4. At the party were several of these conceited fellows, who very soon tried to make him uncomfortable.
    宴会上就有那么几个趾高气扬的人物，他们迫不及待地想使哥伦布难堪。