asperate (v.)

c. 1200, asprete "hardship," from Old French asperité "difficulty, painful situation, harsh treatment" (12c., Modern French âpreté), a figurative use, from Latin asperitatem (nominative asperitas) "roughness," from asper "rough, harsh," which is of unknown origin. The Latin adjective was used also of sour wine, bad weather, and hard times. The figurative meaning "harshness of feeling" in English is attested from 1660s; the literal sense of "roughness of surface" is from early 15c.

early 15c., asperacioun "harshness," from Latin asperationem (nominative asperatio), noun of action from past-participle stem of asperare "to roughen, make rough," figuratively "exasperate," from asper "rough" (see asperity). The meaning "a making rough" is 1721, a noun of action from asperate (v.).