Where does “soldadura” come from?

soldadura (Spanish) comes from Spanish soldar, from Old Spanish soldar, from Latin solidāre.

soldadura (Spanish): soldering; welding

Definitions

Step	Language	Word	Meaning
1	Spanish	soldar	to weld; to solder, to braze
2	Old Spanish	soldar	—
3	Latin	solidāre	—

soldadura — Etymology, Origin & Word History | Etymology Explorer