Which one of the following words is opposite in meaning to Alleviate?

Aggravate

The word that is opposite in meaning to Alleviate is Aggravate.

• Alleviate means to make something less severe or intense.
• Aggravate means to make something worse or more severe.

The other words, exaggerate, relieve, and lighter, do not have the opposite meaning of alleviate. Exaggerate means to make something seem bigger or more important than it really is. Relieve means to make something less severe or intense. Lighter means having less weight or density.