dis·perse 
(dĭ-spûrs)
(dĭ-spûrs)v. dis·persed, dis·pers·ing, dis·pers·es
v.tr.
1.
a. To drive off or scatter in different directions: The police dispersed the crowd. See Synonyms at scatter.
b. To strew or distribute widely: The airplane dispersed the leaflets over the city.
2. To cause to attenuate and disappear: The sun dispersed the fog.
3.
a. To separate (light) into spectral rays.
b. To distribute (particles) evenly throughout a medium.
v.intr.
1. To separate and move in different directions; scatter: The crowd dispersed once the concert ended.
2. To attenuate and vanish; dissipate: The storm clouds had dispersed by noon.
[Middle English dispersen, from Old French disperser, from Latin dispergere, dispers-, to disperse : dis-, apart; see DIS- + spargere, to scatter.]
dis·persed·ly (-spûrsĭd-lē) adv.
dis·perser n.
dis·persi·ble adj.