無話不談

not to hold anything back (idiom) / (of close friends etc) to tell each other everything

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

not to have / no / none / not / to lack / un- / -less

dialect / language / spoken words / speech / talk / words / conversation / what sb said / CL:種|种[zhong3],席[xi2],句[ju4],口[kou3],番[fan1]

surname Tan

to speak / to talk / to converse / to chat / to discuss