glistъ (Proto-Slavic) comes from Proto-Balto-Slavic gléista, from Proto-Indo-European gleh₁y-sto-m, from Proto-Indo-European gleh₁y-, from Proto-Indo-European gleh₁-, from Proto-Indo-European gewl-, from Proto-Indo-European gēw- — to bend, arch.
glistъ (Proto-Slavic): worm