IPA: /ɪnˈsɛstʃuəsnəs/
KK: /ɪnˈsɛstʃuəsnəs/
The condition of being involved in sexual relationships between closely related people, which is often considered taboo or illegal.
The novel explores themes of family dynamics and the consequences of incestuousness.
Incestuousness → It is formed from "incestus" (from Latin, meaning unchaste or impure) and "-ous" (meaning full of) combined with "-ness" (a suffix indicating a state or quality). The word refers to the state of being full of incest or the quality of engaging in incestuous relationships.
Think of 'unchaste' ('incestus') and remember that 'incestuousness' means the quality of being full of unchaste relationships.