- revealing, telling, telltale - disclosing unintentionally; "a telling smile"; "a telltale panel of lights"; "a telltale patch of oil on the water marked where the boat went down"
Antonyms: uninformative, uninstructive (indirect, via informative)
- tattletale, tattler, taleteller, talebearer, telltale, blabbermouth - someone who gossips indiscreetly
--1 is a kind of gossip, gossiper, gossipmonger, rumormonger, rumourmonger, newsmonger