Whatever my boss decides is irrevocable.

Step 1: Analyze the question You need the word closest in meaning to the underlined word, irrevocable, as used in: "Whatever my boss decides is irrevocable."

Step 2: Explain the concept Break the word into parts:

• ir- = not
• revoc- = from the Latin revocare, "to call back"
• -able = capable of being

So irrevocable means cannot be called back, cancelled, or reversed. A decision that is irrevocable is settled and cannot be changed.

Step 3: Test the options

• A. final: A final decision is one that is settled and not to be changed. This matches the meaning.
• B. true: This is about accuracy or correctness, not about whether a decision can be reversed. It does not fit.
• C. necessary: This means something that must be done. A decision can be necessary and still be changed later, so it does not fit.
• D. enforced: This means made to be obeyed. It says nothing about whether a decision can be reversed, so it does not fit.

Step 4: Answer The correct option is **A. The sentence means that whatever the boss decides is settled and cannot be reversed.

Tip: In vocabulary questions, break the word into prefix, root, and suffix. The prefixes ir-, in-, im-, and un- usually mean "not," and irrevocable ≈ "not reversible," which gives "final." Related words are revoke (cancel) and revocation (cancellation).