耐人寻味

tā de huà suī rán bù duō què hěn nài rén xún wèi

他的话虽然不多，却很耐人寻味。

He didn't speak much, but what he said affords much food for reflection.

tā shuō de huà shì hěn nài rén xún wèi de

他说的话是很耐人寻味的。

What he says gives one much food for thought.

tā shēng chēng bù rèn shi tā wǒ jué de zhēn shi nài rén xún wèi

她声称不认识他，我觉得真是耐人寻味。

I find it interesting that she claims not to know him.