stressful的名詞是什麼

例句：

1、 It was a stressful time for all of us.

對我們所有人來説，那是一個艱難的時期。

2、 Having aged relatives to stay in your house can be quite stressful.

年邁的'親戚住在家裏有時壓力相當大。

3、 I think I've got one of the most stressful jobs there is.

我想我得到的這份工作是其中最繁重的工作之一。

4、Some people have to lead stressful lifestyles out of necessity.

一些人迫於生計不得不過着緊張忙碌的生活。