incestuous. (ɪnˈsɛstjʊəs) adj. 1. relating to or involving incest: an incestuous union. 2. guilty of incest. 3. (Law) obsolete resulting from incest: an incestuous bastard. 4. resembling incest in excessive or claustrophobic intimacy. inˈcestuously adv. More @Wikipedia
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