impair

/ˌɪmˈpɛr/

make worse or less effective

中文释义：损害；削弱；损伤

Lack of sleep can impair your ability to concentrate during exams.

睡眠不足会损害你在考试期间的注意力。

The accident impaired his vision, but he still managed to drive safely.

事故损害了他的视力，但他仍然设法安全驾驶。