un-, 不，非，relenting, 缓和。

1. She established her authority with unrelenting thoroughness.

她坚定地树立起自己绝对的权威。

2. The heat was unrelenting.

炎热没有减弱的迹象。

3. He was unrelenting in his pursuit of legal mandate.

他坚决要求得到合法的托管权.

4. In the face of severe opposition and unrelenting criticism, the task seemed overwhelming.

在强烈的反对和毫不留情的批评声中，这个任务似乎让人难以招架。

5. This time the chase would be long and hard and unrelenting.

这一次的追踪将是长期的、艰难的、不屈不挠的.