Free

desocupado

(not in use)

livre

(not imprisoned)

livre

(unconstrained)

livre

(mathematics: unconstrained)

livre

(unobstructed)

livre

(not in use)

livre

(without obligations)

livre

(software: with very few limitations on distribution or improvement)

livre

(programming: not bound)

sem

(without)

vago

(not in use)

de graça

(without needing to pay)

gratuitamente

(without needing to pay)

grátis

(without needing to pay)

libertar

(to make free, set at liberty)

livrar

(to make free, set at liberty)

soltar

(to make free, set at liberty)