Meaning

noun the cardinal number that is the product of ten and four

adjective being ten more than thirty

originEtymology tree Proto-Indo-European *kʷetwṓr Proto-Germanic *fedwōr Proto-Germanic *tigiwiz Proto-Germanic *fedwōr tigiwiz Old English fēowertiġ Middle English fourti English forty From Middle English fourti, feortiȝ, from Old English fēowertiġ, ultimately from Proto-Germanic *fedwōr tigiwiz (“forty”). By surface analysis, four + -ty.

Etymology from Wiktionary, CC BY-SA 3.0