I. twig 1 /twɪɡ/ BrE AmE noun [countable]
[ Language: Old English ; Origin: twigge ]
a small very thin stem of wood that grows from a branch on a tree
—twiggy adjective
II. twig 2 BrE AmE verb ( past tense and past participle twigged , present participle twigging ) [intransitive and transitive]
British English informal to suddenly realize something about a situation:
It took ages before he twigged.