Proto-Yupik: *Navcu-
Meaning: murky (sky)
Russian Meaning: пасмурный (о погоде)
Chaplino: ~ //nāftǝ- 'to get stormy'
Central Alaskan Yupik: navcuitǝ- (neg.) 'to be clear (weather)', navcuiʁ- (neg.) 'to make clear, visible' [Hinz]
Comparative Eskimo Dictionary: 221