Webster’s Revised Unabridged Dictionary · 1913
Asperate
As′per·ate (ăs′pẽr·āt), 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.