Explanation:

Here’s the thing, “Adorn” means to decorate or make something look more attractive. Let’s break down the options:

- Option 1: Subdue

To subdue means to calm down or tone down. It doesn’t directly relate to making something plain or less attractive.

- Option 2: Enrich

Enrich means to make better or add value—pretty much the opposite of what we’re looking for.

- Option 3: Disfigure

Disfigure means to spoil the appearance, to make something look worse. That’s a clear antonym for “adorn”.

- Option 4: Grace

To grace means to add elegance or beauty. That’s actually close in meaning to "adorn."

What this really means is, “Disfigure” is the best antonym here.