gra·tu·i·tous
adjective/ɡrəˈtjuːɪtəs/
/ɡrəˈtuːɪtəs/
(disapproving)- done without any good reason or purpose and often having harmful effects
无正当理由（或目的）的；无谓的 - gratuitous violence on television
电视上无谓的暴力镜头 - It was a completely gratuitous insult which the singer’s agent was forced to apologize for.
这是一种完全无端的侮辱，歌手的经纪人被迫为此道歉。
Oxford Collocations DictionaryGratuitous is used with these nouns:- sex
- violence
Word Originmid 17th cent.: from Latin gratuitus ‘given freely, spontaneous’ + -ous. - gratuitous violence on television