English: (noun) a groan as if in pain, growl
Source: Peter Martin's Kelabit Dictionary
dereng: moans, groans, as if in pain
ngereng (ng-ereng): to groan, make a groaning sound (as a sick person, or ghost); to growl as a dog
ngerereng (ng-rereng): to put downtax
perenga'un: to jump the gun, take the first step
rereng 1: charcoal
rereng 2: putting down