eloquent(s = adj.all) facile, fluent, silver, silver-tongued, smooth-spoken - expressing yourself readily, clearly, effectively; "able to dazzle with his facile tongue"; "silver speech"
Derived forms verb elocute₁, noun eloquence₁

1.  Having the power of expressing strong emotions or forcible arguments in an elevated, impassioned, and effective manner; as, an eloquent orator or preacher. [1913 Webster]
"O Death, all-eloquent! You only prove
What dust we dote on when 't is man we love." [1913 Webster]

2.  Adapted to express strong emotion or to state facts arguments with fluency and power; as, an eloquent address or statement; an eloquent appeal to a jury. [1913 Webster]

eloquent, adj.
1 possessing or showing eloquence.
2 (often foll. by of) clearly expressive or indicative.

Derivative:
eloquently adv.

Etymology:
ME f. OF f. L eloqui (as ELOQUENCE)

N  vigor, power, force, boldness, raciness, intellectual, force, spirit, point, antithesis, piquance, piquancy, verve, glow, fire, warmth, strong language, gravity, sententiousness, elevation, loftiness, sublimity, eloquence, command of words, command of language, vigorous, nervous, powerful, forcible, trenchant, incisive, impressive, sensational, spirited, lively, glowing, sparkling, racy, bold, slashing, pungent, piquant, full of point, pointed, pithy, antithetical, sententious, lofty, elevated, sublime, eloquent, vehement, petulant, impassioned, poetic, in glowing terms, in good set terms, in no measured terms, thoughts that breath and words that burn.

N  speech, faculty of speech, locution, talk, parlance, verbal intercourse, prolation, oral communication, word of mouth, parole, palaver, prattle, effusion, oration, recitation, delivery, say, speech, lecture, harangue, sermon, tirade, formal speech, peroration, speechifying, soliloquy, allocution, conversation, salutatory : screed: valedictory, oratory, elocution, eloquence, rhetoric, declamation, grandiloquence, multiloquence, burst of eloquence, facundity, flow of words, command of words, command of language, copia verborum, power of speech, gift of the gab, usus loquendi, speaker, spokesman, prolocutor, interlocutor, mouthpiece, Hermes, orator, oratrix, oratress, Demosthenes, Cicero, rhetorician, stump orator, platform orator, speechmaker, patterer, improvisatore, speaking, spoken, oral, lingual, phonetic, not written, unwritten, outspoken, eloquent, elocutionary, oratorical, rhetorical, declamatory, grandiloquent, talkative, Ciceronian, nuncupative, Tullian, orally, by word of mouth, viva voce, from the lips of, quoth he, said he, action is eloquence, pour the full tide of eloquence along, she speaks poignards and every word stabs, speech is but broken light upon the depth of the u, to try thy eloquence now 'tis time.