force to go away; used both with concrete and metaphoric meanings
Drive away potential burglars. Drive away bad thoughts. Dispel doubts. The supermarket had to turn back many disappointed customers.
source: WordNet 3.0
to cause to separate and go in different directions
She waved her hand and scattered the crowds.
source: WordNet 3.0
To drive away by scattering, or so to cause to vanish; to clear away; to banish; to dissipate; as, to dispel a cloud, vapors, cares, doubts, illusions.
