Where does “тъп ъгъл” come from?

тъп ъгъл (Bulgarian) comes from Bulgarian ъгъл, from Proto-Slavic ǫgъlъ, from Proto-Balto-Slavic *ángulas, from Proto-Indo-European h₂engulos, from Proto-Indo-European h₂eng- — curve, bend.

тъп ъгъл (Bulgarian): obtuse angle an angle of over 90 degrees

Definitions

  1. obtuse angle an angle of over 90 degrees

Ancestry of “тъп ъгъл”, step by step

тъп ъгъл traces back through two separate lines of ancestry.

via Bulgarian ъгъл

StepLanguageWordMeaning
1Bulgarianъгълangle, corner
2Proto-Slavicǫgъlъcorner, angle
3Proto-Balto-Slavic*ángulas—
4Proto-Indo-Europeanh₂engulosjoint?
5Proto-Indo-Europeanh₂eng-curve, bend

via Bulgarian тъп

StepLanguageWordMeaning
1Bulgarianтъпstupid, dumb (lacking intelligence)
2Proto-Slavictǫpъdull, blunt
Every word from Proto-Indo-European h₂eng- →Every word from Proto-Indo-European h₂engulos →Every word from Proto-Balto-Slavic *ángulas →