be fickle, not to stick to one's words

under tongue, stay with words what you said

back out of one's word

to differ from one's word or command

to be unable to speak, become helplessly speechless

to cut one's tongue off

to be eloquent and smooth-spoken

live carefully and safe among enemies

spoil one's tongue, use foul language, use wrong words or idioms

to become unidiomatic, (of someone) be using foul language

bad, obscene or rude language, tendency to use abusive language

tongue, language, dialect, speech

something which seems nice to hear

be rude, be foul-mouthed

to speak in a very refined language

tongue-twister