心口不一

heart and mouth at variance (idiom); keeping one's real intentions to oneself / saying one thing but meaning sth different

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

pit of the stomach / solar plexus / words and thoughts

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

no; not so / (bound form) not; un-

to vary / to differ

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit