untrue

not according with the facts; "unfortunately the statement was simply untrue"

not true to an obligation or trust; "is untrue to his highest opportunity and duty"-Bruno Laske

not accurately fitted; not level; "the frame was out of true"; "off-level floors and untrue doors and windows"

(used especially of persons) not dependable in devotion or affection; unfaithful; "a false friend"; "when lovers prove untrue"