Where does “piastra” come from?

piastra (Spanish) comes from Italian piastra, from Italian impiastrare, from Latin emplastrare.

piastra (Spanish): piastre

Definitions

Step	Language	Word	Meaning
1	Italian	piastra	sheet, plate; slab; hotplate
2	Italian	impiastrare	to plaster, dirty or smear
3	Latin	emplastrare	—

piastra — Etymology, Origin & Word History | Etymology Explorer