Cavernous (adjective)

1. Having the characteristics of a cavern, such as being large and echoing.
2. Having a large empty space inside.

Origin:

From latin cavernosus "full of caverns", from caverna "cavern".

Examples:

1. The cave was cavernous, with high ceilings and echoing chambers.
2. The patient's sinus cavity was found to be cavernous, causing difficulty in breathing.
3. The grand hall was cavernous, with its high ceiling and marble floor.
4. The cavernous hole in the ground was big enough to fit a car.
5. The cavernous warehouse was dimly lit and filled with rows of shelves.