слоушати (Old Church Slavonic) comes from Old Church Slavonic слоухъ, from Proto-Slavic sluxъ, from Proto-Slavic slūti, from Proto-Indo-European ḱléw-(e)-ti, from Proto-Indo-European ḱlew-, from Proto-Indo-European ḱel- — to cover; to incline.
слоушати (Old Church Slavonic): to listen