耐人寻味 [- rén xún wèi]afford [give] much food for thought; provide much food for thought; stand careful reading; There is much food for thought.; thought-provoking:
•¶ 他的话虽然不多， 却耐人寻味。 He didn't speak much, but what he said affords much food for reflection.
•¶ 语颇隽永，耐人寻味。 The remarks are meaningful and thought-provoking.