a̱pwilaawk [a̱p/wi/*laawk]
Stem with modifying proclitic composed of: ḵ'ap=  really, wilaay  know, -k  
intransitive verb. knowingly do something; deliberately
../mp3s/a/apwilaawk-mb-k-01.mp3 A̱pwilaawksa gwelkntga waap. The house was deliberately set on fire.

Source: Draft Dictionary entry.