verb
menstruate
MEN-stroo-ayt/ˈmenstrueɪt/
Discharge blood and tissue from the uterus during a menstrual period.
Some people experience mild cramps when they menstruate each month.

Etymology
The “monthly” base names the recurring cycle rather than the discharge itself. The English verb probably arose by shortening menstruation, though derivation from the Latin verb menstruare is also possible.
In context
why women menstruate in other words why do women have periods
More examples
- Her doctor asks whether she menstruates regularly.
- She uses a heating pad while menstruating.
- She first menstruated when she was twelve.
Forms
menstruate · menstruates · menstruated · menstruating
menstruation noun — Uterine bleeding and tissue discharge during a period.
menstrual adjective — Relating to menstruation or the menstrual cycle.
Similar words
- have a period
- Everyday phrasing for the same process, rather than a clinical verb.
- bleed
- Refers to blood loss generally, not specifically menstrual discharge.