Select the most appropriate synonym of the given word: INFANTILE

The correct answer is Puerile.

Explanation:

The word Infantile refers to something characteristic of an infant or early childhood; childish, immature, or basic.

Let's analyze the given options to find the most appropriate synonym:

1. Puerile: Meaning childishly silly, immature, or trivial. This directly matches the meaning of "infantile".

2. Sophisticated: Having or showing a lot of experience and knowledge about the world and culture; advanced or complex. (Antonym)

3. Seasoned: Experienced, mature, or accustomed to particular conditions. (Antonym)

4. Mature: Fully developed physically or mentally; adult. (Antonym)

Therefore, Puerile is the correct synonym for Infantile.