unfictitious

Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Germanic *un- Proto-West Germanic *un- Old English un- Middle English un- English un- Proto-Indo-European *dʰeyǵʰ- Proto-Indo-European *dʰi-né-ǵʰ-ti Proto-Italic *θingō Proto-Italic *fingōder. Latin fingō Latin fictus Proto-Indo-European *-ikos Proto-Italic *-ikos Latin -īcus Proto-Indo-European *-yós Proto-Italic *-ios Old Latin -ios Latin -ius Latin -īcius Latin fictīciusbor. English fictitious English unfictitious From un- + fictitious.

来源：wiktionary