IPA: /ˌmæstəˈbeɪtəri/
KK: /mæstərˈbeɪtəri/
Relating to the act of self-stimulation for sexual pleasure.
He wrote a masturbatory novel that focused solely on his own experiences.
Masturbatory → It is formed from "masturbari" (Latin, meaning to rub or to touch) and the suffix "-ory" (meaning relating to or characterized by). The word "masturbatory" refers to something that is related to the act of self-stimulation.
Think of the Latin root 'masturbari' which means to 'rub' or 'touch' — this helps you remember that 'masturbatory' relates to the act of self-stimulation.
No commonly confused words.