Added 8 October 2026
rule
/ɹuːl/ noun
In Latin: rēgula, lēx, norma Wiktionary
noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about rule at Wordnik → Where our words come from →
verb
Origin
From Middle English reule, rewle, rule, borrowed from Old French riule, reule, from Latin regula (“straight stick, bar, ruler, pattern”), from regō (“to keep straight, direct, govern, rule”), ultimately from Proto-Indo-European *h₃réǵeti (“to straighten; right”), from the root *h₃reǵ-; see regent. Doublet of rail, regal, regula, and rigol.
From Wiktionary, via Kaikki.org (CC BY-SA)