1) Desolate 2) Force migration from an area 3) Reduce 4) Reduce in population 5) Shrink 1) Dispeople 2) Unpeople 
• (v. t.) To deprive of inhabitants, whether by death or by expulsion; to reduce greatly the populousness of; to dispeople; to unpeople. • (v. i.) To become dispeopled.
De·pop'u·late transitive verb [ imperfect & past participle Depopulated ; present participle & verbal noun Depopulating .] [ Latin depopulatus , past participle of depopulari to ravage; de- + populari to ra...
[v] - reduce in population
depopulate, depopulating 1. To remove or to reduce the population of, from destruction or expulsion. 2. To cause a country or area to have fewer people living in it.
desolate verb reduce in population; `The epidemic depopulated the countryside`
to destroy an entire flock