gwilbaya'an [gwil/ba/*ya'an]
Stem with modifying proclitic composed of: gwil=  right away, ba̱xyaa  go up, -'n  causative
intransitive verb. multiply; increase
../mp3s/gw/gwilbaya'an-ab-hb-01.mp3 Ła gwilbaya'ansga k'abałgüüłk. The children have multiplied.

Source: Draft Dictionary entry.