exasperate
Cross references:
1. irritate
1. ex.as.per.ate \ig-'zas-p*-.ra-t\ vt [L exasperatus, pp. of exasperare,
fr. ex- + asper roug]h 1a: to excite or inflame the anger of : ENRAGE 1b:
to cause irritation or annoyance to obs 2: to make grievous or more
grievous or malignant
2. ex.as.per.ate \-r*t\ aj 1: EXASPERATED 2: roughened with irregular
prickles or elevations {~ seed coats>
Webster's English Dictionary