Eloquent

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late Middle English: via Old French from Latin eloquent- ‘speaking out’, from the verb eloqui (see eloquence).

wiktionary

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From Old French eloquent, from Latin eloquens(“speaking, having the faculty of speech, eloquent”), present participle of eloqui(“to speak out”), from e(“out”) + loqui(“to speak”).

etymonline

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eloquent (adj.)

"having the power of expressing strong emotions in vivid and appropriate speech; able to utter moving thoughts or words," late 14c., from Old French eloquent, from Latin eloquentem (nominative eloquens) "speaking, having the faculty of speech; eloquent," present participle of eloqui "to speak out" (see eloquence). Related: Eloquently.