pratikriyā | प्रतिक्रिया | pratikriyA

prati-˚kriyā | प्रति-˚क्रिया | f. requital (of good or evil), retaliation, compensation, retribution, MBh.; Kāv. &c.

opposition, counteraction, prevention, remedy, help, ib. (ifc. = removing, destroying)