say it: uhn-TROO
untrue is an adjective meaning "not according with the facts". It carries 4 recorded senses.
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”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for untrue come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.