Origin of incestuous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
relating to or involving incestan incestuous union
guilty of incest
obsolete resulting from incestan incestuous bastard
resembling incest in excessive or claustrophobic intimacy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
1530s, from Latin incestuosus "incestuous," from incestus "unchaste" (see incest). Figurative use is from 1744. Related: Incestuously; incestuousness.
Online Etymology Dictionary, © 2010 Douglas Harper
Of, involving, or suggestive of incest.
Having committed incest.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.