overcloud

verb (used with object)

1. to overspread with or as if with clouds: a summer storm that briefly overclouds the sun; to overcloud one’s pleasure with solemn thoughts.
2. to darken; obscure; make gloomy: a childhood that was overclouded by the loss of his parents.

verb (used without object)

3. to become clouded over or overcast: Toward evening the sky began to overcloud.

verb

1. to make or become covered with clouds
2. to make or become dark or dim

v.1590s, from over- + cloud (v.). Related: Overclouded; overclouding.