Where does “dorsal” come from?

dorsal (Catalan) comes from Catalan dors, from Dutch dorst, from Middle Dutch dorst, from Old Dutch thurst, from Proto-West Germanic þurstu, from Germanic *þurstuz, from Proto-Indo-European ters- — dry.

dorsal (Catalan): rear

Definitions

  1. rear

Ancestry of “dorsal”, step by step

StepLanguageWordMeaning
1Catalandorsback; backside, reverse
2Dutchdorstthirst, physical need/desire to drink; thirst,...
3Middle Dutchdorstthirst; longing
4Old Dutchthurstthirst
5Proto-West Germanicþurstuthirst
6Germanic*þurstuz—
7Proto-Indo-Europeanters-dry
Every word from Proto-Indo-European ters- →Every word from Germanic *þurstuz →Every word from Proto-West Germanic þurstu →