exasperate

Exasperate hangs with a rough crowd. It derives from exasperatus, the past participle of the Latin verb exasperare, which in turn was formed by combining ex- with asper, meaning "rough." Another descendant of asper in English is asperity, which can refer to the roughness of a surface or the roughness of someone's temper. Another relative, albeit a distant one, is the English word spurn, meaning "to reject." Lest you wish to exasperate your readers, you should take care not to confuse exasperate with the similar-sounding exacerbate, another Latin-derived verb that means "to make worse," as in "Their refusal to ask for help only exacerbated the problem."