Where does “free rein” come from?

free rein (English) comes from English rein, from Middle English rein, from Old French resne, from Late Latin retina, from Latin retinēre, from Latin rĕ-, from Latin prōdūcō, from Latin prō- — passed , crossed.

free rein (English): A rein of a horse held loosely so that the animal can move more freely; also, the free condition that this gives to a horse

Definitions

  1. A rein of a horse held loosely so that the animal can move more freely; also, the free condition that this gives to a horse

Ancestry of “free rein”, step by step

free rein traces back through two separate lines of ancestry.

via English rein

StepLanguageWordMeaning
1EnglishreinA strap or rope attached to a bridle or bit, used...
2Middle Englishreinstrip of land forming a boundary; furrow;...
3Old Frenchresnerein
4Late Latinretina
5Latinretinēre
6Latinrĕ-back, backwards
7Latinprōdūcōto lead or bring forth, forward or out
8Latinprō-forward direction, forward movement
9Proto-Italic*pro-pro- see the Latin entry for further meanings
10Proto-Indo-Europeanpro-toward, forward
11Proto-Indo-Europeanpor-to give birth; forward, through; going, passage
12Proto-Indo-Europeanper-before, in front; first; to go through
13Proto-Indo-Europeanpr̥tóspassed , crossed

via English Free

StepLanguageWordMeaning
1EnglishFreeUnconstrained
2EnglishfallerOne who falls; A fruit that falls from the tree,...
3English-erA person or thing that does an action indicated...
4Middle English-eragentive suffix; agent noun suffix
5Old French-erAlternative form of -ier, verbal suffix;...
6Latin-ārefirst conjugation
7Proto-Italic-āōForms primarily denominative verbs
8Proto-Indo-European-eh₂yétiCreates iterative/ frequentative/ intensive...
9Proto-Indo-European-yétiCreates intransitive, often deponent,...
10Proto-Indo-Europeanyé-
11Chichewaiyehe, she
Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Latin rĕ-