Open English Wordnet
Adjectives
(s)untruenot according with the facts“unfortunately the statement was simply untrue” (s)untruenot true to an obligation or trust“is untrue to his highest opportunity and duty” (Bruno Laske) (s)out of true, untruenot accurately fitted; not level“the frame was out of true”,
“off-level floors and untrue doors and windows” (s)false, untrue(used especially of persons) not dependable in devotion or affection; unfaithful“a false friend”,
“when lovers prove untrue”