the.com/elocution

means The art of speaking clearly and expressively — controlling voice, pronunciation, and delivery for maximum effect.

from From Latin 'elocutio,' meaning style of speech or expression, built from 'e-' (out) and 'loqui' (to speak) — the same root that gives us 'eloquent' and 'loquacious.' In Roman rhetoric, elocutio was one of the five canons of oratory, concerned specifically with verbal style and delivery. The word flourished in 18th and 19th century Britain and America, when 'elocution' became a formal school subject — complete with manuals teaching proper breathing, gesture, and pronunciation for public speaking.