decimation
每十人殺一人,大批殺害
Dec·i·ma·tion n.
1. A tithing. [Obs.]
2. A selection of every tenth person by lot, as for punishment.
3. The destruction of any large proportion, as of people by pestilence or war.
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decimation
n : destroying or killing a large part of the population
(literally every tenth person as chosen by lot)