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

be learnt by heart, constantly recited or uttered

to be eloquent and smooth-spoken

to be a fluent and sharp speaker

to cut one's tongue off

reference to talkativeness

to pronounce correctly

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

to speak truthfully

to be unable to speak, become helplessly speechless

something which seems nice to hear

be rude, be foul-mouthed

live carefully and safe among enemies

to speak in a very refined language

to be in unison

extremely eloquent

speak very chaste language