i Register
In some senses, asper is marked as obsolete, historical. Watch for register when choosing this word.
adj
Rough or harsh; severe, stern, serious.
An asper sound.
noun
Rough breathing; a mark (#) indicating that part of a word is aspirated, or pronounced with h before it.
noun
Any one of several small coins, circulated around the eastern Mediterranean area from the 12th to 17th centuries.
And for ten Aspers you shall daily finde some amongst them, that will give themselves a deepe gash with a Scimitarie, either in their armes or thighes.