口是心非

duplicity / hypocrisy (idiom)

mouth / classifier for things with mouths (people, domestic animals, cannons, wells etc) / classifier for bites or mouthfuls

variant of 是[shi4] / (used in given names)

to be (followed by substantives only) / correct; right; true / (respectful acknowledgement of a command) very well / (adverb for emphatic assertion)

heart / mind / intention / center / core / CL:顆|颗[ke1],個|个[ge4]

abbr. for 非洲[Fei1 zhou1], Africa

to not be; not / wrong; incorrect / non-; un-; in-; de- / to reproach; to blame / (coll.) to insist on; simply must