Why was clemency trending last week?
late 14c., "pertaining to menses," also (in astronomy) "monthly," from Old French menstruel, from Latin menstrualis "monthly," especially "of or having monthly courses," from menstruus "of a month, every month, monthly, pertaining to a month," from mensis "month" (see moon (n.)).
premenstrual pre·men·stru·al (prē-měn'strōō-əl)
Of or occurring in the period just before menstruation.
menstrual men·stru·al (měn'strōō-əl) or men·stru·ous (-əs)
Of or relating to menstruation.