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tr.v. ex·as·per·at·ed, ex·as·per·at·ing, ex·as·per·ates
1. To make very angry or impatient; annoy greatly.
2. To increase the gravity or intensity of: "a scene ... that exasperates his rose fever and makes him sneeze" (Samuel Beckett).
[Latin exasperāre, exasperāt- : ex-, intensive pref.; see ex- + asperāre, to make rough (from asper, rough).]