Where does “āers” come from?

āers (Middle Dutch) comes from Old Dutch ars, from Proto-West Germanic ars, from Proto-Germanic arsaz, from Proto-Indo-European h₁orsos — arse.

Ancestry of “āers”, step by step

StepLanguageWordMeaning
1Old Dutcharsarse, buttock
2Proto-West Germanicarsarse, anus, buttocks
3Proto-Germanicarsazarse/ass, anus, buttocks
4Proto-Indo-Europeanh₁orsosarse

Words derived from “āers

Every word from Proto-Indo-European h₁orsosEvery word from Proto-Germanic arsazEvery word from Proto-West Germanic ars