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stimulus; stimulation; irritation (esp. of the body, e.g. skin, eyes)
impetus; impulse; stimulus; spur; incentive; encouragement; stimulation; motivation; provocation
excitement; thrill
辛い食べ物は胃への刺激が強い。
Spicy food is very stimulating to the stomach.
この映画は知的な刺激に満ちている。
This movie is full of intellectual stimulation.
新しい環境が彼に良い刺激を与えた。
The new environment gave him good stimulation.