Where does “мъногъ” come from?

мъногъ (Old East Slavic) comes from Proto-Slavic mъnogъ, from Proto-Balto-Slavic managas, from Proto-Indo-European monogʰos, from Proto-Indo-European mengʰ-.

Ancestry of “мъногъ”, step by step

StepLanguageWordMeaning
1Proto-Slavicmъnogъmany
2Proto-Balto-Slavicmanagasmany
3Proto-Indo-Europeanmonogʰos—
4Proto-Indo-Europeanmengʰ-—
Every word from Proto-Indo-European mengʰ- →Every word from Proto-Indo-European monogʰos →Every word from Proto-Balto-Slavic managas →