Where does “najędrnieć” come from?

najędrnieć (Polish) comes from Polish jędrnieć, from Polish -ec, from Old Polish -ec, from Proto-Slavic -ьcь, from Lithuanian -ikas, from Proto-Indo-European -iḱos — -y, -ic.

Ancestry of “najędrnieć”, step by step

StepLanguageWordMeaning
1Polishjędrniećto become firmer
2Polish-ecA masculine suffix
3Old Polish-ecforms nouns
4Proto-Slavic-ьcьForms diminutives from nouns; Forms nouns from...
5Lithuanian-ikas—
6Proto-Indo-European-iḱos-y, -ic
Every word from Proto-Indo-European -iḱos →Every word from Polish -ec →Every word from Proto-Slavic -ьcь →