Antonyms for alleviate

relieve; lessen:

incite, upset, depress, aggravate, irritate, intensify, magnify, heighten, worsen, agitate, increase.

noun:

impair, provoke, harm, increase, rouse, kindle, stir up, arouse, stir, excite, augment, injure, enhance, hurt, sharpen, fan, exacerbate, embitter.