un-, 不，非，due, 合适的。

1. It might give the Commission undue influence over the coming negotiations.

这可能会在即将开启的谈判问题上给委员会带来过多的影响。

2. Any exercise that causes undue shortness of breath should be stopped.

任何导致呼吸出现困难的锻炼都应停止。

3. The voting went off without any undue irregularities.

这次投票顺利进行，未发生任何违规行为。

4. He had behaved with undue and oily familiarity.

他表现得过于亲热，媚态毕现。

5. They are taking undue advantage of the situation.

他们过分利用了这种情势。