exempt vs duty-free

exempt and duty-free both are adjectives.

Word	Noun	Adjective	Verb	Adverb
exempt	No	Yes	Yes	No
duty-free	No	Yes	No	No

exempt (adjective)	duty-free (adjective)
(of persons) freed from or not subject to an obligation or liability (as e.g. taxes) to which others or other things are subject	exempt from duty
(of goods or funds) not subject to taxation

exempt (verb)	duty-free (verb)
grant exemption or release to
grant relief or an exemption from a rule or requirement to