retaliate
/rɪˈtælieɪt/ verb [I]
› to do something bad to someone because they have done something bad to you: They have threatened to retaliate against any troops that attack.
retaliation
/rɪˌtæliˈeɪʃən/ noun [U] › They bombed the hotel in retaliation for the arrests. retaliatory
/rɪˈtæliətəri/ adjective › retaliatory measures