Where does “krepostnoi” come from?

krepostnoi (Ingrian) comes from Russian крепостно́й, from Russian кре́пость, from Old East Slavic крѣпость, from Proto-Slavic krěpostь, from Proto-Slavic -ostь — Used with adjectival stems to form abstract...

krepostnoi (Ingrian): serf

Definitions

  1. serf

Ancestry of “krepostnoi”, step by step

StepLanguageWordMeaning
1Russianкрепостно́йserf
2Russianкре́постьstrength, stoutness
3Old East Slavicкрѣпостьstrength
4Proto-Slavickrěpostьstrength
5Proto-Slavic-ostьUsed with adjectival stems to form abstract...
Every word from Proto-Slavic -ostьEvery word from Proto-Slavic krěpostьEvery word from Old East Slavic крѣпость