untruth
n. US //ənˈtɹuθ// UK //ʌntɹˈuːθ// un·truth
Inherited from Middle English untreuth, from Old English untrēowþ and unġetrēowþ, from Proto-West Germanic untriuwiþu and ungatriuwiþu, equivalent to un- + truth. Cognate with Old High German ungitriuwida.