uznávat (Czech) comes from Czech uznat, from Czech znát, from Slovene znáti, from Proto-Slavic znati, from Proto-Balto-Slavic źnōˀtei, from Proto-Indo-European ǵnéh₃t, from Proto-Indo-European ǵneh₃- — to know.
uznávat (Czech): imperfective form of uznat