Where does “мощней” come from?

мощней (Russian) comes from Russian мощь, from Old Church Slavonic мощь, from Proto-Slavic moťь, from Proto-Indo-European mógʰtis, from Proto-Indo-European meǵʰ- — to be able.

Ancestry of “мощней”, step by step

StepLanguageWordMeaning
1Russianмощьmight, force, power, strength
2Old Church Slavonicмощьability; power
3Proto-Slavicmoťьpower
4Proto-Indo-Europeanmógʰtis—
5Proto-Indo-Europeanmeǵʰ-to be able
Every word from Proto-Indo-European meǵʰ- →Every word from Proto-Indo-European mógʰtis →Every word from Proto-Slavic moťь →