Where does “вечерок” come from?

вечерок (Russian) comes from Russian ве́чер, from Old East Slavic вечеръ, from Proto-Slavic večerъ, from Proto-Balto-Slavic wékeras, from Proto-Indo-European wekʷsperos.

Ancestry of “вечерок”, step by step

StepLanguageWordMeaning
1Russianве́черevening
2Old East Slavicвечеръ
3Proto-Slavicvečerъevening
4Proto-Balto-Slavicwékerasevening
5Proto-Indo-Europeanwekʷsperos
Every word from Proto-Indo-European wekʷsperosEvery word from Proto-Balto-Slavic wékerasEvery word from Proto-Slavic večerъ