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

Motivated to achieve something due to one's own interest.

plural of intrinsic motivation

(music) leitmotif

plural of motive power

(philosophy) A form of an ad hominem attack consisting of questioning someone's motives to dismiss their claim.

plural of motivated reasoning

The phenomenon of seeking out rational arguments in favor of a conclusion already reached for non-rational (chiefly emotional) reasons.

(economics) The pursuit of financial gain as a motivation for individuals and firms to conduct business.

plural of motive power depot