How do you spell Asper

Available Definitions:
1)  a. - Rough; rugged; harsh; bitter; stern; fierce.
2)  n. - The rough breathing; a mark (/) placed over an initial vowel sound or over / to show that it is aspirated, that is, pronounced with h before it; thus "ws, pronounced h/s, "rh`twr, pronounced hra"t/r.
3)  n. - A Turkish money of account (formerly a coin), of little value; the 120th part of a piaster.