Lo hizo por envidia: He did it for (out of) envy.
3. To denote equivalency of any kind, as—
Cinco peniques por libra: Fivepence for a pound—per pound.
Trocar un producto por otro: To exchange one product for another.
Considerar á uno bueno por £1,000: To consider somebody as good for £1,000.
Por mejor le envié yo como viajante: I sent you to travel, holding you for a better man.
Tienda por tienda, prefiero esta: Of the two shops I prefer this.
4. To denote distribution, as—
Vinieron cinco por cinco: They came five by five.
=Para= is used—