[in.cest] n [ME, fr. L incestus sexual impurity, fr. incestus impure, fr. in- + castus pure--more at caste] (13c): sexual intercourse between persons so closely related that they are forbidden by law to marry; also: the statutory crime of such a relationship
INCEST
Meaning of INCEST in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012