Where does “уктоо” come from?

уктоо (Kyrgyz) comes from Kyrgyz укта, from Proto-Turkic ū — sleep.

Ancestry of “уктоо”, step by step

StepLanguageWordMeaning
1Kyrgyzуктаto sleep
2Proto-Turkicūsleep
Every word from Proto-Turkic ū →Every word from Kyrgyz укта →