(1):

(v. t.) To exasperate; to provoke; to irritate.

(2):

(v. t.) To make heavy or heavier; to add to; to increase.

(3):

(v. t.) To give coloring to in description; to exaggerate; as, to aggravate circumstances.

(4):

(v. t.) To make worse, or more severe; to render less tolerable or less excusable; to make more offensive; to enhance; to intensify.