unrelenting

1. ADJ If you describe someone's behaviour as unrelenting, you mean that they are continuing to do something in a very determined way, often without caring whether they hurt or embarrass other people. 不留情面地堅持的

She established her authority with unrelenting thoroughness. 她以徹底的一絲不茍樹立了自己的權威。

2. ADJ If you describe something unpleasant as unrelenting, you mean that it continues without stopping. 無休止的 (不愉快的事情)

...an unrelenting downpour of rain. …一場下不停的傾盆大雨。