Where does “ruler” come from?

Ruler comes from Middle English reuler, formed from Old French -er (agent suffix) attached to a verb stem, derived from Latin -arius (noun-forming suffix) and ultimately from Proto-Indo-European h₃reǵ- meaning to direct or rule.

ruler (English): A (usually rigid), flat, rectangular measuring or drawing device with graduations in units of measurement; a straightedge with markings

Definitions

  1. A (usually rigid), flat, rectangular measuring or drawing device with graduations in units of measurement; a straightedge with markings

Ancestry of “ruler”, step by step

StepLanguageWordMeaning
1Middle Englishreulerruler, leader, governor; ruler
2Middle Englishreulelegal code, set of rules; moral code, principles;...
3Old Frenchreulerule; ruler; rule
4Latinrēgularule, bar
5Latin-ularegō + API → rēgula; tegō + API → tēgula;...
6Proto-Indo-European-tlomAlternative form of *-trom
7Proto-Indo-European-tromForms nouns denoting a tool or instrument
8Proto-Indo-European-tḗrDerives agent nouns from verbs, denoting someone...

Words derived from “ruler

Every word from Proto-Indo-European -tḗr