be fickle, not to stick to one's words

under tongue, stay with words what you said

to differ from one's word or command

back out of one's word

to be eloquent and smooth-spoken

be learnt by heart, constantly recited or uttered

reference to talkativeness

something which seems nice to hear

live carefully and safe among enemies

to speak in a very refined language

be rude, be foul-mouthed

to be a fluent and sharp speaker

to cut one's tongue off

to be left dry-tongued, to speak a lot, loquaciousness

to pronounce correctly

to speak truthfully

to be unable to speak, become helplessly speechless

extremely eloquent

speak very chaste language

be tongue-tied