English: reply, return
Source: Peter Martin's Kelabit Dictionary
mekupat (ng-pekupat): turn in a contrary manner
ngupat: to answer, respond to (an accusation, etc)
pekupat: upside down, turned contrary to the way it should be, as a person lying with his head at the foot of the bed
pekupat (pep-kupat): turn each other in a contrary manner ?
pingkupat (p-in-ekupat): was turned in a contrary manner by