IPA: //ˌpriːmɛnˈstrʌl//
KK: /prɛmɛnstrəl/
Relating to the time just before a woman's monthly period starts.
Many women experience mood swings during the premenstrual phase.
Premenstrual → It is formed from "pre-" (meaning before) and "menstruus" (from Latin, meaning monthly, related to menses). The word "premenstrual" refers to the time before the monthly menstrual cycle begins.
Think of 'pre-' meaning before and 'menstruus' relating to the monthly cycle — this helps you remember that 'premenstrual' refers to the time before the monthly period.