simple past tense and past participle of motive

plural of motivity

motivating; serving to motivate / (grammar) In, marked by or pertaining to the motivative case.

(grammar) The motivative case, a case found in some languages (for example Basque) which marks the meaning "because of".

(music) In accordance with, or by means of, a motif.

plural of by-motive

(sometimes figuratively) The power that enables something to move. / (rail transport, collectively) The locomotives that operate on a railway.

An alternative or extrinsic reason for doing something, especially when concealed or when differing from the stated or apparent reason.

plural of ulterior motive

The incentive to undertake an activity based on the expected enjoyment of the activity itself, rather than external benefits that might result.