unprovoked
adj. (生气等)无缘无故的
近义词：wanton，motiveless，gratuitous，senseless，uncalled-for，meaningless，malicious，
英英释义
Adjective
- occurring without motivation or provocation;
"motiveless malignity" "unprovoked and dastardly attack"
例句
用作形容词(adj.)
- This malicious and unprovoked attack astounded him.这个恶意的无端攻击使他吃惊。
- The boys' attack on the old woman was quite unprovoked.那帮男孩对老妇人的袭击完全是无来由的。