IPA: /prəˈmɪs.kjuː.ɪ.ti/
KK: /prəˈmɪs.kju.ɪ.ti/
The state of having many sexual partners or being sexually active with multiple people without commitment.
His promiscuity led to various health issues and complicated relationships.
Promiscuity is formed from "promiscuus" (from Latin, meaning mixed or indiscriminate) and the suffix "-ity" (meaning the state or condition of). The word refers to the state of being mixed or having indiscriminate sexual relationships.
Think of 'mixed' ('promiscuus') to remember that 'promiscuity' refers to the state of having mixed or indiscriminate relationships.
No commonly confused words.