[f. prec.] To make rough or uneven in surface, rugged or harsh in sound, manner, etc.
1656. in Blount, Glossogr.
1676. Phil. Trans., XI. 644. How to … sweeten or asperate a style according as the nature of the subject requireth.
a. 1691. Boyle, Wks., I. 683 (R.). The level surface of water being by agitation asperated with … bubbles.
1858. Polson, Law & Lawyers, 137. No opposition [could] asperate his voice.
