zkoušet (Czech) comes from Proto-Slavic kušati, from Proto-Slavic kusiti, from Gothic 𐌺𐌰𐌿𐍃𐌾𐌰𐌽, from Proto-Germanic kauzijaną, from Proto-Germanic keusaną, from Proto-Indo-European ǵews- — to taste, try.
zkoušet (Czech): to test; to examine; to rehearse