Correct Answer: Irrevocable

Solution : The first option is the correct answer.

Irrevocable means impossible to change or undo, and it accurately captures the essence of the group of words in the sense of being permanent or irreversible. It signifies something that cannot be altered or revoked.

The meanings of the other options are as follows:

• An order is a directive or command.
• Coerce means to compel or force someone to do something against their will.
• Intimidate means to frighten or threaten in order to make someone do something.

Therefore, the correct answer is irrevocable .