kǒu chǐ
mouth and teeth
enunciation
to articulate
diction
age (of cattle, horses etc)
kǒu chǐ líng lì
eloquent and fluent speaker (idiom); grandiloquence
the gift of the gab
kǒu chǐ bù qīng
to lisp
unclear articulation
inarticulate
kǒu chǐ qīng chu
clear diction
clear articulation
kǒu chǐ shēng xiāng
eloquence that generates perfume (idiom); profound and significant text
dòu kǒu chǐ
to quarrel
to bicker
glib repartee