Where does “ceroso” come from?

ceroso (Spanish) comes from Latin cerosus, from Latin -ōsus, from Old Latin -ōssus.

ceroso (Spanish): waxen

Definitions

Step	Language	Word	Meaning
1	Latin	cerosus	full of wax; waxy
2	Latin	-ōsus	—
3	Old Latin	-ōssus	—

ceroso — Etymology, Origin & Word History | Etymology Explorer