decimate
1. [ verb ] kill one in every ten, as of mutineers in Roman armies
Related terms: kill eliminate
2. [ verb ] kill in large numbers
Synonyms: eradicate eliminate wipe_out annihilate carry_off extinguish
Examples:

"the plague wiped out an entire population"

Related terms: kill annihilation annihilation decimation annihilator
Similar spelling:   decimeter
  decimation
  desquamate
  decimetre
  descent
  descant