Where does “áspera” come from?

áspera (Spanish) comes from Latin asper, from Proto-Indo-European h₂esp- — to cut.

áspera (Spanish): feminine singular of áspero

Definitions

Step	Language	Word	Meaning
1	Latin	asper	rough, uneven, coarse; unrefined, rude; sharp,...
2	Proto-Indo-European	h₂esp-	to cut

áspera — Etymology, Origin & Word History | Etymology Explorer