twenty

Etymology

From Middle English twenty, twenti, from Old English twēntiġ (“twenty”, literally “two tens”), from Proto-Germanic *twaintigiwiz, *twai tigiwiz, an old compound of *twain- (“two”) + *-tigaz (“group of ten”), equivalent to two + -ty, or twain + -ty. Cognate with Scots twenty, tuenty (“twenty”), West Frisian tweintich (“twenty”), Dutch twintig (“twenty”), German zwanzig (“twenty”), Danish tyve.

num

1. The cardinal number 20, occurring after nineteen and before twenty-one.

noun

1. (colloquial) A banknote with a denomination of 20.
   The waiter’s face lit up when I gave him a twenty.
   The more a shop looks as though it trades in farthings and ha’pennies, the more tenners and twenties you can expect to hand over at the till. 1 September 2020, Tom Lamont, “The butcher's shop that lasted 300 years (give or take)”, in The Guardian
2. (CB slang) 10-20 (location).
   What’s your twenty, good buddy?
   What's your twenty? Where's your brain? Checking in to check you out Concerned about your whereabouts 2012, Tom Dumont, Tony Kanal, Gwen Stefani, 0:54 from the start, in Settle Down (music video), No Doubt (actor), Vevo
3. (UK, historical, military) An old English division of infantry.