Cavernous
Part of speech: adjective
Definition: resembling a cavern; vast having many caverns
Hollow
Part of speech: verb
Definition: to make a hole in something; to excavate
Part of speech: adjective
Definition: (of something solid) Having an empty space or cavity inside.(of a sound) Distant, eerie; echoing, reverberating, as if in a hollow space; dull, muffled; often low-pitched.Without substance; having no real or significant worth; meaningless.Insincere, devoid of validity; specious.
Part of speech: noun
Definition: A small valley between mountains; "he built himself a cabin in a hollow high up in the Rockies"A sunken area in something solid.(US) A sunken area, the equivalent to a copse in British English.A feeling of emptiness.
Example sentence: August, the summer's last messenger of misery, is a hollow actor.