Choose the most suitable one-word substitution for the following.
An action that cannot be changed.
Show answer & explanation
Correct answer: B
Explanation
Correct Answer
Irrevocable
Explanation
"Irrevocable" means something that cannot be changed, reversed, or cancelled once it has been done or decided. Therefore, it is the most suitable one-word substitution for an action that cannot be changed.
The other options are incorrect. "Irascible" means easily angered. "Irrefutable" means impossible to deny or disprove. "Irreplicable" means incapable of being replicated or reproduced.
Key Points
"Irrevocable" means permanent, unalterable, or impossible to reverse. It is commonly used for decisions, actions, agreements, or legal orders that cannot be changed once made.