无端的英文：
sideless

Gratuitous violence repels.
无端使用暴力则激起民愤。

Unprovoked aggression/attacks
无端的侵犯[攻击]

The weight of irrational guilt pressed on her.
无端的负罪感压得她喘不过气来。

A clear conscience laughs at false accusation
只要问心无愧,无端的指责可以一笑置之

But civility has been sacrificed to the gratuitous insult.
然而礼貌却沦为无端侮辱的牺牲品。

She was prey to irrational fears.
她遭受着无端恐惧的折磨。

The most headless passer-by feels the depressing influences of a place
一到这个地方，连最没心事的人也会象所有的过路人一样无端端的不快活。

This situation is at the least unsettling, and at the most a grave and wholly unwarranted provocation.
这一形势至少是令人不安的，极而言之，则是一场严重的全然无端的挑衅。

interrupted Tang Yun-shan with great assurance, laughing boisterously for no particular reason
唐云山忽然很有把握似的插进来说，无端地哈哈笑了。

Mr Biden is known for his affection towards Israel but took the announcement as a gratuitous insult.
人们都知道拜登先生对以色列有好感，但他还是认为这一决定是对其无端的羞辱。