(UNDERSTAND) [verb] -gg- [informal] - to suddenly understand or know (something); to realizeShe still hasn't twigged how to do it. [+ wh- word]Suddenly twigging what I meant, he ran to the phone. [+ wh- word]Ann's expecting a baby - had you twigged? [I](esp. US) When she mentioned Monte Carlo, I twigged to what was going on. [T; I + to]
TWIG
Meaning of TWIG in English
Cambridge English vocab. Кембриджский английский словарь. 2012