depraver
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de·prave
(dĭ-prāv′)tr.v. de·praved, de·prav·ing, de·praves
To debase, especially morally; corrupt. See Synonyms at corrupt.
[Middle English depraven, to corrupt, from Old French depraver, from Latin dēprāvāre : dē-, de- + prāvus, crooked.]
dep′ra·va′tion (dĕp′rə-vā′shən) n.
de·prav′er n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.