Where does “слабоумный” come from?

слабоумный (Russian) comes from Russian слабоумие, from Russian у́м, from Old East Slavic умъ, from Proto-Slavic umъ, from Proto-Indo-European h₂ew-m-, from Proto-Indo-European h₂ew- — to enjoy; to consume; to perceive, see, to be...

слабоумный (Russian): imbecile, weakheaded, weakminded, feeble-minded, soft in the head

Definitions

  1. imbecile, weakheaded, weakminded, feeble-minded, soft in the head

Ancestry of “слабоумный”, step by step

StepLanguageWordMeaning
1Russianслабоумиеdementia; stupidity, idiocy
2Russianу́мmind
3Old East Slavicумъmind, intellect
4Proto-Slavicumъmind
5Proto-Indo-Europeanh₂ew-m-—
6Proto-Indo-Europeanh₂ew-to enjoy; to consume; to perceive, see, to be...
Every word from Proto-Indo-European h₂ew- →Every word from Proto-Indo-European h₂ew-m- →Every word from Proto-Slavic umъ →