"No cause, however just, can warrant the ____ slaughter that is going on” (Mahatma Gandhi, in To Every Briton (1940)) (14)

I believe the answer is:

indiscriminate

(Other definitions for indiscriminate that I've seen before include "Done at random" , "Promiscuous" , "Uncritical" , "Acting at random" , "Sweeping" .)

I've seen this clue in The Times.

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