ir-,不，非，reverent,尊敬的。

1. Taylor combined great knowledge with an irreverent attitude to history.

泰勒知识渊博，而且并不把历史太当回事。

2. an irreverent attitude to tradition

不把传统放在眼里的态度

3. He employs an irreverent humour to salt his observation.

他运用玩世不恭的幽默使他的评论更加有趣.

4. It's irreverent for a man not to take his hat off in church.

一个人在教堂里不脱帽子是无礼的.

5. But it were irreverent to describe that revelation.

但是要描述这次揭示实在是大不敬.