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;

Unorthodox is the debut album by Edge of Sanity, released in 1992 by Black Mark.

independent in behavior or thought; "she led a somewhat irregular private life"; "maverick politicians"

Unorthodox are a doom metal band from Maryland.

breaking with convention or tradition; "an unorthodox lifestyle"