Where does “peligroso” come from?

peligroso (Spanish) comes from Latin periculosus, from Latin -ōsus, from Old Latin -ōssus.

peligroso (Spanish): perilous, dangerous

Definitions

Step	Language	Word	Meaning
1	Latin	periculosus	dangerous, hazardous, perilous
2	Latin	-ōsus	—
3	Old Latin	-ōssus	—

peligroso — Etymology, Origin & Word History | Etymology Explorer