Incest is sexual relations between close relatives. Prosecuted for incest, the incest taboo, a case of incest.
It is a criminal offence everywhere and a very serious one where a child or a dependent adult is involved. The taboo is close to universal across societies, though which relatives count differs. Royal families in several ancient states were the exception, and the effects showed.
1nounincestSexual relations between close relatives.
“Most societies have strict laws against incest.”
incest is an offence.
Latin incestus means impure or unchaste — in-, not, plus castus, pure. Chaste is the same root.
Latin
incestus
English, today
incest
Latin incestus. mǣġhǣmed. a doublet of inchaste.
Etymology from Wiktionary, CC BY-SA