pigeo

Etymology
From, though De Vaan is skeptical.

Verb

 * 1) to feel annoyance or reluctance at; to repent of
 * 2)   to irk, pain, disgust, afflict, grieve
 * Mē piget ignāviae tuae.

Usage notes

 * Personal conjugation is very rare, and non-classical. In Classical usage, only the impersonal verb exists.