nätäl' (Võro) comes from Old East Slavic недѣлꙗ, from Proto-Slavic neděľa, from Proto-Slavic dělo, from Proto-Slavic děti, from Proto-Balto-Slavic dḗˀtei, from Proto-Indo-European dʰeh₁- — to do, put, place.
nätäl' (Võro): week