Make rough or harsh

• Roughen, old style

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1650s, "make rough," from Latin asperatus , past participle of asperare "to roughen, make rough, exasperate," from asper "rough" (see asperity ). Related: Asperated ; asperating .

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Asperate \As"per*ate\, v. t. [imp. & p. p. Asperated ; p. pr. & vb. n. Asperating .] [L. asperatus, p. p. of asperare, fr. asper rough.] To make rough or uneven. The asperated part of its surface. --Boyle.

Wiktionary Word definitions in Wiktionary
rough v To make rough or harsh.