每十人殺一人,大批殺害
Decimation \Dec`i*ma"tion\, n. [L. decimatio: cf. F.
d['e]cimation.]
1. A tithing. [Obs.] --State Trials (1630).
2. A selection of every tenth person by lot, as for
punishment. --Shak.
3. The destruction of any large proportion, as of people by
pestilence or war. --Milman.
decimation
n : destroying or killing a large part of the population
(literally every tenth person as chosen by lot)