Nouns

(n)branchlet, twig, spriga small branch or division of a branch (especially a terminal division); usually applied to branches of the current or preceding year

Verbs

(v)twigbranch out in a twiglike manner“The lightning bolt twigged in several directions”
(v)catch on, get wise, get onto, tumble, latch on, cotton on, twig, get itunderstand, usually after some initial difficulty“She didn't know what her classmates were plotting but finally caught on”