twig 2 (twĭg) v.
twigged, twig·ging, twigsChiefly British
v.
tr.
To observe or notice.
To understand or figure out: "The layman has twigged what the strategist twigged almost two decades ago"(Manchester Guardian Weekly).
v.
intr. To be or become aware of the situation; understand: "As Europe is now twigging, the best breeding ground for innovators who know how to do business is often big, competitive companies"(Economist).
[Irish Gaelic tuigim, I understand, from Old Irish tuicim.]
O.E. twigge, from P.Gmc. *twigan (cf. M.Du. twijch, Du. twijg, O.H.G. zwig, Ger. Zweig "branch, twig"), from the root of twi- (see twin), here meaning "forked" (as in O.E. twisel "fork, point of division"). Twiggy "slender" is recorded from 1562.