Free

prostý

(without)

svobodný

(not imprisoned)

svobodný

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

volný

(not imprisoned)

volný

(unconstrained)

volný

(mathematics: unconstrained)

volný

(unobstructed)

volný

(not in use)

volný

(without obligations)

volný

(programming: not bound)

zadarmo

(without needing to pay)

osvobodit

(to make free, set at liberty)

osvobozovat

(to make free, set at liberty)