noun, feminine/ʁɛɡl/plural: règles
rule, regulation; rule, period of ruling; ruler (for measuring length); period, menstruation
“Pour atteindre le bonheur il y a deux règles : 1. Contentez-vous de ce que vous avez. 2. Essayez d'en avoir un maximum.” — To attain happiness there are two rules: 1. Be happy with what you have. 2. Try to have as much of it as possible.
Synonyms: menstruation
Inherited from Middle French regle, from Late Old French regle (13th c.), borrowed from Latin regula. Displaced the earlier borrowing Old French riule, reule (whence English rule). Compare also the inherited Old French reille (whence English rail). Doublet of rail, reille, rigole, and rille.