What is meant by the term asperate?

Asperate can have two different meanings depending on the context in which it is used:

1. (of a surface) Rough or uneven to the touch; having small raised points.

* For example: "The walls were asperate with the bumps and ridges of the old wallpaper".

2. (Linguistics) (of a consonant sound) Pronounced with audible friction or turbulence, as in the English 'h'.

* For example: "The asperate sounds of certain languages can be difficult to pronounce for speakers of other languages".