Other forms: seventies
Seventy is seven times ten. Seventy years, seventy per cent, over seventy already.
The old psalm gives seventy as a human lifespan, which is where three score and ten comes from. Seventy divides by only seven, ten and their factors, so it is awkward in a way sixty is not.
1nounseventySeven times ten.
“He retired at seventy and worked for another decade unpaid.”
seventy is a number.
Old English hundseofontig, from seven plus a form meaning ten.
Proto-Germanic
*sebuntēhundą — seventy
Old English
hundseofontiġ
Middle English
seventy
English, today
seventy
From Middle English seventy, sevynty, from Old English hundseofontiġ, from Proto-Germanic sebuntēhundą (“seventy”), equivalent to seven + -ty. Cognate with Scots seiventy (“seventy”), stq soogentich (“seventy”), West Frisian santich (“seventy”), Dutch zeventig (“seventy”), German Low German söventig (“seventy”), German siebzig (“seventy”), Swedish sjuttio (“seventy”), Norwegian sytti (“seventy”), Icelandic sjötíu (“seventy”).
Etymology from Wiktionary, CC BY-SA