HSK 7-9
耐人寻味
nàirénxúnwèi(idiom) thought-provoking; to provide food for thought
电影结尾含蓄而耐人寻味。
Diànyǐng jiéwěi hánxù ér nàirénxúnwèi.
The film's understated ending is thought-provoking.
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Appears across levels (7-9) in the HSK 3.0 word list.