无端

无端 [wú duān]

1. ■ for no reason; without cause; sideless:

无端侮辱 a gratuitous insult;

无端争吵 quarrelled for no reason;

无端诽谤 slander groundlessly;

无端而起 be unprovoked;

无端生事 make trouble out of nothing;

无端受责 be falsely accused and condemned;

他们无端大吵一场。 They quarrelled for nothing.