Where does “потьмянілий” come from?

потьмянілий (Ukrainian) comes from Ukrainian потьмяніти, from Ukrainian тьмяні́ти, from Ukrainian тьмя́ний, from Ukrainian тьма, from Old East Slavic тьма, from Proto-Slavic tьmà, from Proto-Balto-Slavic timāˀ, from Proto-Indo-European tēmH- — dark.

Ancestry of “потьмянілий”, step by step

StepLanguageWordMeaning
1Ukrainianпотьмянітиto dim, to grow dim
2Ukrainianтьмяні́тиto dim, to grow dim
3Ukrainianтьмя́нийdim, faint
4Ukrainianтьмаdarkness
5Old East Slavicтьмаdarkness
6Proto-Slavictьmàdark, darkness
7Proto-Balto-Slavictimāˀdarkness
8Proto-Indo-EuropeantēmH-dark
Every word from Proto-Indo-European tēmH- →Every word from Proto-Balto-Slavic timāˀ →Every word from Proto-Slavic tьmà →