Used when covering a single object, and none of the more specific words for "covers" apply, such as chepitt (chechepiitt) "covers several things, covers it with a soft object" and tuupitt (tetepiitt) "covers with lid, dams up".
Cuevas pronounces the "uu" softly here, so that it almost sounds like etepitt. Other speakers may say it with a more pronounced uu.