Etymograph

English

subrule

From sub- + rule.

A compound of sub- + rule

Proto-Indo-European *upó ‘up; from below’

Proto-Italic *supo ‘under’

Latin sub ‘under, beneath, below’

English sub-

Proto-Indo-European *h₃reǵ- ‘to straighten’

…

Latin regō ‘to keep straight’

Latin regula ‘straight stick’

Old French riule

Middle English reule

English rule

Today it means

noun A narrow rule which defines the specific meaning of a broader rule

Sources

Sources: Wiktionary, “subrule”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / subrule

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