Body Part / Noun + 刺激
刺激 (cìjī) can mean "irritation," "stimulation," or "to stimulate," depending on context. As a noun, it refers to a physical or chemical irritation, such as 眼睛刺激 (eye irritation). As a verb, it means to provoke or stimulate something, and it can also describe something thrilling or exciting in colloquial use.
这种化学品会对皮肤产生刺激。
Zhè zhǒng huàxuépǐn huì duì pífū chǎnshēng cìjī.
This chemical can irritate the skin.
辣椒对眼睛的刺激特别大,切的时候要小心。
Làjiāo duì yǎnjing de cìjī tèbié dà, qiē de shíhou yào xiǎoxīn.
Chili peppers are very irritating to the eyes; be careful when cutting them.
坐过山车太刺激了,我还想再坐一次。
Zuò guòshānchē tài cìjī le, wǒ hái xiǎng zài zuò yī cì.
Riding the roller coaster was so thrilling; I want to ride it again.