twig

v. t.

  1. To twitch; to pull; to tweak.
  2. To understand the meaning of; to comprehend; as, do you twig me?
  3. To observe slyly; also, to perceive; to discover.
  4. To beat with twigs.

n.

  1. A small shoot or branch of a tree or other plant, of no definite length or size.