motive(a)
n. the psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior"he acted with the best of motives"
同义词：motivationneed
a theme that is elaborated on in a piece of music 同义词：motif
adj. causing or able to cause motion"a motive force"; " motive power"
同义词：motor
impelling to action"motive pleas"
同义词：motivative(a)motivating