Retaliatory (adjective)

1. Done in retaliation or as a revenge.
2. Done in response to an act perceived as hostile or aggressive.

Origin:

From the word "retaliate" meaning "to take revenge or to respond in kind".

Examples:

1. The company's retaliatory measures were seen as excessive by many.
2. The government's retaliatory tariffs were met with criticism.
3. The employee's retaliatory actions were unacceptable.
4. The country's retaliatory strikes were a response to the terrorist attack.
5. The athlete's retaliatory behavior resulted in a suspension from the game.