to rouse to action or effort, as by encouragement or pressure; spur on; incite

to stimulate his interest in mathematics.

Physiology, Medicine/Medical . to excite (a nerve, gland, etc.) to its functional activity.

to invigorate (a person) by a food or beverage containing a stimulant, as coffee, tea, or alcoholic liquor.

to act as a stimulus or stimulant.

adjective

adrenalizing , appealing , arousing , bracing , breathtaking , challenging , electrifying , energizing , exhilarating , gripping , hair-raising * , hectic , inspiring , interesting , invigorating , lively , moving , provocative , rousing , spine-tingling * , stirring , thought-provoking , thrilling , titillating , animating , enlivening , quickening , vitalizing , vivifying , exhilarant , innerving , intoxicating , refreshing , reinvigorating , renewing , restorative , roborant , brisk , erotic , exciting , intriguing