Make a hole or tunnel, typically for use as a dwelling is called....

Spend the winter in a dormant state is called.....

An area of darkness, caused by light being blocked by something is called....

The coldest season of the year in polar and temperate zones; it does not occur in most of the tropical zone is called.....

Beneath the surface of the ground is called.....

Full of or overcast by clouds is called....

Estimate that (a specified thing) will happen in the future or will be a consequence of something is called.....

A heavily built, gregarious, burrowing rodent of both Eurasia and North America, typically living in mountainous country is called.....

A hollow place in a solid body or surface is called.....