Definition of incest

competent Definition: (adjective) having the skill and knowledge needed for a particular task; capable Petersons.com

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< incessant

incestuous >

in·cest    (nsst) KEY  

NOUN:

1. Sexual relations between persons who are so closely related that their marriage is illegal or forbidden by custom.
2. The statutory crime of sexual relations with such a near relative.

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ETYMOLOGY:
Middle English, from Latin incestum, from neuter of incestus, impure, unchaste : in-, not ; see in- ¹ + castus, pure, chaste; see kes- in Indo-European roots

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