from
The Collaborative International Dictionary of English v.0.48
Twelve \Twelve\, a. [OE. twelve, twelf, AS. twelf; akin to
OFries. twelf, twelef, twilif, OS. twelif, D. twaalf, G.
zw["o]lf, OHG. zwelif, Icel. t[=o]lf, Sw. tolf, Dan. tolv,
Goth. twalif, from the root of E. two + the same element as
in the second part of E. eleven. See {Two}, and {Eleven}.]
One more that eleven; two and ten; twice six; a dozen.
[1913 Webster]
{Twelve-men's morris}. See the Note under {Morris}.
{Twelve Tables}. (Rom. Antiq.) See under {Table}.
[1913 Webster]