IPA: //ʌnˈtruː//
KK: /ʌnˈtru/
Not correct or accurate; false or misleading.
The rumors about her were untrue and hurtful.
Untrue → It is formed from "un-" (meaning not) and "true" (from Old English "triewe", meaning faithful or loyal). The word "untrue" means not faithful or not loyal, indicating something that is false or incorrect.
Think of 'not' ('un-') combined with 'faithful' ('true') to remember that 'untrue' means something that is not faithful or is false.