motive
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noun
1. a reason for doing something, especially one that is hidden or not obvious:
【行動などの】動機, 理由, 誘因; 目的 «for, behind»
e.g. a motive for his murder.
2. (in art, literature, or music) a motif:
＝ motif
e.g. the entire work grows organically from the opening horn motive.
adjective attributive
1. producing physical or mechanical motion:
〖名詞の前で〗原動力となる
e.g. the charge of gas is the motive force for every piston stroke.
2. causing or being the reason for something:
動機となる, 行動を促す
e.g. the motive principle of a writer's work.
DERIVATIVES
motiveless |ˈmōdivləs| adjective
motivelessly |ˈmōdivləslē| adverb
motivelessness noun
ORIGIN
late Middle English: from Old French motif (adjective used as a noun), from late Latin motivus, from movere ‘to move’.