Identify the most appropriate ANTONYM of the given word.
Lenient

The correct option is Strict.

Explanation:

Lenient means merciful, tolerant, or permissive (not strict).

Let us look at the meanings of all the given options to find the correct antonym:

1. Strict: Demanding exact conformity to rules and standards; severe or stern. This is the direct opposite (antonym) of Lenient.

2. Kind: Having or showing a friendly, generous, and considerate nature. (Synonymous in tone, not an antonym).

3. Rowdy: Noisy and disorderly.

4. Rude: Offensively impolite or ill-mannered.

Therefore, the most appropriate antonym for Lenient is Strict.