Meaning

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

adjective being ten more than sixty

originFrom Middle English seventy, sevynty, from Old English hundseofontiġ, from Proto-Germanic *sebuntēhundą (“seventy”), equivalent to seven + -ty. Cognate with Scots seiventy (“seventy”), Saterland Frisian soogentich (“seventy”), West Frisian santich (“seventy”), Dutch zeventig (“seventy”), German Low German söventig (“seventy”), German siebzig (“seventy”), Swedish sjuttio (“seventy”), Norwegian…

Etymology from Wiktionary, CC BY-SA 3.0