ἐμμήνιος
From LSJ
ὁ χρόνος ἐστὶ δάνος, τὸ ζῆν πικρός ἐσθ' ὁ δανίσας → time is a loan, and he who lent you life is a hard creditor | time is on loan and life's lender is a prick
English (LSJ)
ον,
A monthly: τὰ ἐ. the menses of women, Hp.Nat.Mul.7; ἐ. αἷμα γυναικῶν J.BJ4.8.4.
German (Pape)
[Seite 808] monatlich; τὰ ἐμμ., monatliche Reinigung der Frauen, Hippocr.