adj. 25B6; adjective
a truthful answer : HONEST, sincere, trustworthy, genuine; candid, frank, open, forthright, straight; informal upfront, on the level; N. Amer. informal on the up and up.
a truthful account : TRUE, accurate, correct, factual, faithful, reliable; unvarnished, unembellished; formal veracious, veridical.
deceitful, untrue.