adjective

(of a person or a person’s words) having or showing the ability to speak fluently and coherently.

an articulate account of their experiences

eloquent,fluent,communicative,effective,persuasive,coherent,lucid,vivid,expressive,silver-tongued,vocal

verb

Express (an idea or feeling) fluently and coherently.

they were unable to articulate their emotions

express,give expression to,voice,give voice to,vocalize,put in words,give utterance to,communicate,declare,state,set forth,bring into the open,make public,assert,divulge,reveal,proclaim,announce,raise,air,ventilate,vent,give vent to,pour out,mention,talk of,point out,go into