To present participles which come from intransitive verbs, or are themselves employed as adjectives, to mark the absence of the activity, disposition, or condition implied by the participle;

not paid; "unpaid wages"; "an unpaid bill"

without payment; "the soup kitchen was run primarily by unpaid helpers"; "a volunteer fire department"

engaged in as a pastime; "an amateur painter"; "gained valuable experience in amateur theatricals"; "recreational golfers"; "reading matter that is both recreational and mentally stimulating"; "unpaid extras in the documentary"