Etymology tree Proto-Indo-European *bʰeh₂- Proto-Indo-European *bʰéh₂ti Proto-Italic *fāōr Latin for, fā- Proto-Indo-European *-dʰlomder. Latin -bula Latin fābula Proto-Indo-European *h₃ed- Proto-Indo-European *-os Proto-Indo-European *h₃édosder.? Proto-Italic *-ōtsos or *-otsos Latin -ōsus Latin fābulōsusder. Middle English fabulous English fabulousclip. English fab From fabulous, by shortening.