Facing the opponent's accusations, the politician quickly organized a strong counterattack.

counterattack 是由前缀 counter-（表示“反对、对抗”）和名词 attack（攻击）组成的复合名词，字面意思是"对抗性攻击"，即"反击"。counterattack 指针对攻击或批评采取的对抗性回应行动。