The Collaborative International Dictionary
Asperating
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
asperating
vb. (present participle of asperate English)