Where does “azul” come from?

azul (Galician) comes from Old Portuguese azul//azur, from Latin lazulum, from Arabic لازورد, from Classical Persian لاجورد.

azul (Galician): blue

Definitions

Step	Language	Word	Meaning
1	Old Portuguese	azul//azur	—
2	Latin	lazulum	heaven, sky
3	Arabic	لازورد	lapis lazuli; azure
4	Classical Persian	لاجورد	—

azul — Etymology, Origin & Word History | Etymology Explorer