MEANING: adjective: Restless, uneasy.

From Middle French rester (to remain), from Latin restare (to remain standing). Ultimately from the Indo-European root sta- (to stand), which is also the source of stay, stage, stable, instant, establish, static, system, stet and nihil obstat. Earliest documented use: 1549.

Earlier the word meant refusing to go forward, as in a restive horse. Over time the word shifted in meaning and now it means the opposite. Instead of "unable to advance", now it means "unable to remain still".

FESTIVE - today's "restive".