telling

an act of narration; "he was the hero according to his own relation"; "his endless recounting of the incident eventually became unbearable"

informing by words

disclosing information or giving evidence about another

disclosing unintentionally; "a telling smile"; "a telltale panel of lights"; "a telltale patch of oil on the water marked where the boat went down"

powerfully persuasive; "a cogent argument"; "a telling presentation"; "a weighty argument"

producing a strong effect; "gave an impressive performance as Othello"; "a telling gesture"