Proto-Yupik: *cak-(nǝʁ-), *cakvǝ-
Meaning: to have difficulty, a hard time
Russian Meaning: мучиться, страдать
Chaplino: sakníqaquq
Alutiiq Alaskan Yupik: cakn_ǝʁ-
Chugach (AAY): caktūɣ-, KP cakuɣ-
Koniag (AAY): Kod cakn_iuʁ-, cakuɣ-, AP cakūɣ-
Central Alaskan Yupik: cakfiuɣ-; cakn_ǝʁ- 'to struggle for function'
Norton Sound (Peripheral): cakǝtǝ- 'to work hard'
Comparative Eskimo Dictionary: 64, 65
