What does the word spike mean?

Usage examples for spike

  1. Seven soldiers to attend seventeen laden donkeys were entirely too small a number while passing through a jungle; for while the path is but a foot wide, with a wall of thorny plants and creepers bristling on each side, and projecting branches darting across it, with knots of spikey twigs stiff as spike- nails, ready to catch and hold anything above four feet in height, it is but reasonable to suppose that donkeys standing four feet high, with loads measuring across from bale to bale four feet, would come to grief. – How I Found Livingstone by Sir Henry M. Stanley
  2. Spike merely shook his head once. – The Wrong Twin by Harry Leon Wilson
  3. There doesn't seem to be much chance to spike Weegman's guns, but it's worth trying. – Lefty Locke Pitcher-Manager by Burt L. Standish