Where does “Kropftaube” come from?

Kropftaube (German) comes from German taube, from German taub, from Middle High German toup, from Old High German toub, from Proto-West Germanic daub, from Proto-Germanic daubaz, from Proto-Indo-European dʰewbʰ-, from Proto-Indo-European dʰewh₂- — smoke; mist, haze.

Kropftaube (German): pouter, cropper breed of pigeon with a large crop

Definitions

  1. pouter, cropper breed of pigeon with a large crop

Ancestry of “Kropftaube”, step by step

Kropftaube traces back through two separate lines of ancestry.

via German taube

StepLanguageWordMeaning
1Germantaubepigeon, dove
2Germantaubdeaf; numb; empty
3Middle High Germantoup
4Old High Germantoubdeaf
5Proto-West Germanicdaubstunned; deaf
6Proto-Germanicdaubazstunned; deaf
7Proto-Indo-Europeandʰewbʰ-deep
8Proto-Indo-Europeandʰewh₂-smoke; mist, haze

via German kropf

StepLanguageWordMeaning
1Germankropfcrop, craw part of a bird's throat
2Middle High Germankropf
3Old High Germankropfcrop, craw
4Proto-West Germanic*kropp
5Proto-Germanickruppaza body; mass; a compressed, round mass; lump;...
6Proto-Indo-Europeangrewb-to warp, bend, crawl; to bend, crouch, crawl; to...
7Proto-Indo-Europeanger-to turn, bend, twist, wind; to tie, bind...
Every word from Proto-Indo-European dʰewh₂-Every word from Proto-Indo-European dʰewbʰ-Every word from Proto-Germanic daubaz