Capable of being put to use:
— Usable byproducts.

synonym: useable.

Polish: używalny

Fit or ready for use or service:
— The lawnmower is a bit rusty but still usable.

synonyms: functional, operable, operational, useable.

Polish: używalny

Convenient for use or disposal:
— 2000 square feet of usable office space.

synonyms: available, useable.