Naphal means to fall, fall down, lie prostrate, or be cast down. It appears about 435 times. It describes physical falling, military defeat, falling on one's face in worship, and the casting of lots.
Falling before God is an act of worship and submission. Falling in battle is divine judgment. 'Casting lots' uses naphal — the lot 'falls' where God determines (Proverbs 16:33). The word captures both human vulnerability and divine sovereignty over all outcomes.