IPA: /prəˈmɪs.kju.əs.li/
KK: /prəˈmɪs.kju.əs.li/
In a way that involves having many different sexual partners or being indiscriminate in choices.
He dated promiscuously, never settling down with one person for long.
Promiscuously → It is formed from "promiscuus" (from Latin, meaning mixed or indiscriminate) and the suffix "-ly" (meaning in a manner of). The word "promiscuously" means in a manner that is mixed or lacking discrimination, often referring to sexual behavior without commitment.
Think of 'mixed' or 'indiscriminate' to remember that 'promiscuously' describes behavior that is not selective or committed.