retaliate

verb

1. (intransitive)To do something harmful or negative to get revenge for some harm; to fight back or respond in kind to an injury or affront.

   “John insulted Peter to retaliate for Peter's acid remark earlier.”

   “Many companies have policies in place to prevent bosses from retaliating against allegations of harassment.”

2. (transitive)To repay or requite by an act of the same kind.

   “One ambassador sent word to the duke's son that his visit should be retaliated.”

   “1713-174, Jonathan Swift and Alexander Pope, Memoirs of Martinus Scriblerus Preface It is unlucky to be obliged to retaliate the injuries of authors, whose works are so soon forgotten that we are in danger of appearing the first aggressors.”