motiveless
🇬🇧/ˈməʊtɪvləs/ 🇺🇸/ˈmoʊtɪvləs/ 31GREoccurring without motivation or provocation; "motiveless malignity" "unprovoked and dastardly attack"- F.D.Roosevelt
adjective [原级]无动机的
It was an apparently motiveless murder.这显然是一起没有动机的谋杀案。
单词造句:
It was an apparently motiveless murder.这显然是一起没有动机的谋杀案。