Where does “зустрічна” come from?

зустрічна (Ukrainian) comes from Ukrainian зу́стріч, from Proto-Slavic sъrěsti, from Proto-Slavic sъ-, from Proto-Indo-European h₁su-, from Proto-Indo-European h₁wes- — good; to be cheerful, happy; to eat, to feast.

Ancestry of “зустрічна”, step by step

StepLanguageWordMeaning
1Ukrainianзу́стрічmeeting, encounter
2Proto-Slavicsъrěstito meet; to encounter; to find
3Proto-Slavicsъ-good
4Proto-Indo-Europeanh₁su-good
5Proto-Indo-Europeanh₁wes-good; to be cheerful, happy; to eat, to feast
Every word from Proto-Indo-European h₁wes- →Every word from Proto-Indo-European h₁su- →Every word from Proto-Slavic sъ- →