cannibalise

verb

1. (UK, transitive)To eat (parts of) another of one's own species.

   “The female black widow spider is known to cannibalise the male.”

2. (UK, transitive)To remove parts of (a machine, etc) for use in other similar machines.

   “to cannibalize an old laptop for parts”

   “According to our correspondent, at least one of the Type 2s has had to be cannibalised to facilitate repairs, as spares are often in short supply.”

   “When the attack ceased they managed to cannibalize parts to get one truck going and set off for the rendezvous with Fraser, only to find nobody there.”

3. (UK, transitive)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.”

4. (UK)Rework old material; rehash.