cannibalise

verb4

1. •
   To eat (parts of) another of one's own species.

   • The female black widow spider is known to cannibalise the male.
2. •
   To remove parts of (a machine, etc) for use in other similar machines.

   • to cannibalize an old laptop for parts
3. •
   Rework old material; rehash.
4. •
   To reduce sales or market share (for one of one's own products) by introducing another.

   • iPad mini to cannibalize 1M full-size iPad sales. — 2012