English: half-closed, as of sleepy eyes
Source: Peter Martin's Kelabit Dictionary
ayep 1: a vine, the fibres of which are shredded and used to weave cloth and also for making fishing nets.
kayep: swimming
kayep kayep: dog paddle in the water
mayep: half-closed, as of sleepy eyes; slit-eyed
perekayep (pere-kayep) (perikayep): to swim for one's life; to dog paddle