English Reference

Word

incestuous

Phoneticsin·ces·tu·ous

US/ˌɪnˈsɛstʃwəs/

UK/ɪnsˈɛstʃuːəs/

Definition

adj. describing a sexual relationship between people who are closely related by blood. It can also describe a situation where a small group of people only deal with each other, like a family business.

adj. relating to or involving sexual relations between close blood relatives. In a figurative sense, it describes a situation where a small group operates in isolation from the outside world, such as a family-run business or a closed social circle.

Examples

“The family business is so incestuous that everyone is related.”

“The committee was criticized for being incestuous, as all the members were former colleagues from the same university department.”

Examples

simple

“The family business is so incestuous that everyone is related.”

contextual

“The committee was criticized for being incestuous, as all the members were former colleagues from the same university department.”

Real-World Examples

“The unsettling incestuous romance between half-siblings Juliet and Neville needed closure.”
The Guardian · 30 Aug 2026

Etymology

From incest + -ous.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

incestNounincestuousAdjective

This entry

Level
C1 · Advanced
Frequency
Occasional
Updated

Scan code

englishreference.com/q/incestuous

English Reference