
Latin word jure comes from Proto-Indo-European *h₂ey-, and later Proto-Indo-European *h₂óyu (Long time, lifetime.)
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*h₂ey- (Proto-Indo-European)
*h₂óyu (Proto-Indo-European)
Long time, lifetime.
*h₂yew- (Proto-Indo-European)
*h₂yéw-os (Proto-Indo-European)
*jowos (Proto-Italic)
Law. Oath.
*jowezāō (Proto-Italic)
Swear (an oath).
ious (Old Latin)
iuro (Latin)
I swear on oath; I vow.
xurar (Asturian)
To swear (promise).
jus (Latin)
(meaning right or law).