Etymology Explorer › English

Where does “sister-in-law” come from?

sister-in-law (English) comes from Middle English suster-in-lawe, from Middle English lawe, from Old English lagu, from Old Norse lǫg, from Old Norse lág, from Old Norse leggja, from Proto-Germanic lagjaną, from Proto-Indo-European legʰ- — to lie.

sister-in-law (English): A female relative of one's generation, separated...

Definitions

  1. A female relative of one's generation, separated...

Ancestry of “sister-in-law”, step by step

StepLanguageWordMeaning
1Middle Englishsuster-in-lawesister-in-law
2Middle EnglishlaweA law, regulation, or a group of them; Morality,...
3Old Englishlagusea, water, lake; the runic character ᛚ; law,...
4Old Norselǫgfate; situation, the condition that one is given...
5Old Norselága felled tree; log; lying tree
6Old Norseleggjato lay, place, put; to make, build
7Proto-Germaniclagjanąto lay, to place in a resting position
8Proto-Indo-Europeanlegʰ-to lie

Words derived from “sister-in-law”

  • co-sister-in-law
Every word from Proto-Indo-European legʰ- →