Yiddish בײַ

← German bei (cognate)

← English by (cognate)

← Proto-Germanic *bi (inherited)

← Middle High German bī (inherited)

← Proto-West Germanic *bī (inherited)

← Old High German bī (inherited)

← Proto-Indo-European *h₂m̥bʰi (derived)

→ Yiddish בײַטאָג (compound)

→ Yiddish בײַנאַכט (compound)

→ Yiddish בײַקומען (affix)