Where does “untrue” come from?

Untrue derives from English true, which comes from Latin unus meaning "one," ultimately from Proto-Indo-European óynos with the same sense.

untrue (English): False; not true; Not faithful or loyal

Definitions

  1. False; not true; Not faithful or loyal

Ancestry of “untrue”, step by step

StepLanguageWordMeaning
1Middle Englishuntreweuntrue
2Old Englishuntrīeweuntrue, not faithful
3Proto-West Germanic*untriuwīuntrue, disloyal, unfaithful
4Proto-Germanic*untriwwizuntrue, disloyal, unfaithful

Words derived from “untrue”

Every word from Proto-Germanic *untriwwiz →Every word from Proto-West Germanic *untriuwī →Every word from Old English untrīewe →