Where does “Schwiegermutterzunge” come from?

Schwiegermutterzunge (German) comes from German Schwiegermutter, from German Schwieger, from Middle High German swiger, from Old High German swigar, from Proto-West Germanic *swegru, from Proto-Germanic swegrō, from Proto-Indo-European sweḱrúh₂, from Proto-Indo-European swéḱuros — father-in-law.

Schwiegermutterzunge (German): mother-in-law's tongue

Definitions

  1. mother-in-law's tongue

Ancestry of “Schwiegermutterzunge”, step by step

Schwiegermutterzunge traces back through two separate lines of ancestry.

via German Schwiegermutter

StepLanguageWordMeaning
1GermanSchwiegermuttermother-in-law
2GermanSchwiegermother-in-law
3Middle High Germanswiger
4Old High Germanswigar
5Proto-West Germanic*swegrumother-in-law
6Proto-Germanicswegrōmother-in-law
7Proto-Indo-Europeansweḱrúh₂mother-in-law
8Proto-Indo-Europeanswéḱurosfather-in-law

via German zunge

StepLanguageWordMeaning
1Germanzungetongue organ in the mouth
2Middle High Germanzungetongue
3Old High Germanzungatongue; language
4Proto-West Germanictungātongue; speech, language
5Proto-Germanictungǭtongue; speech, language
6Proto-Indo-Europeandn̥ǵʰwéh₂stongue
Every word from Proto-Indo-European swéḱurosEvery word from Proto-Indo-European sweḱrúh₂Every word from Proto-Germanic swegrō