Select the most appropriate ANTONYM of the given word.

Mellow

Harsh

The most appropriate antonym of the given word "mellow" is harsh.

• Mellow means to become soft, gentle, or mild.
• Harsh means to be rough, severe, or unpleasant.

Therefore, the antonym of mellow would be a word that means the opposite of becoming soft, gentle, or mild. Of the above options, only harsh means to be rough, severe, or unpleasant. So the answer is Option 3: Harsh.

The other options are not antonyms of mellow.

• Shiny means to reflect light brightly.
• Medium means of average or moderate size, quality, or amount.
• Soft means not hard or firm; easily yielding to pressure.