cavern, cave, hollow; see hole 3.
"grotto." YourDictionary, n.d. Web. 26 February 2019. <https://thesaurus.yourdictionary.com/grotto>.
grotto. (n.d.). Retrieved February 26th, 2019, from https://thesaurus.yourdictionary.com/grotto
A hollow beneath the earth's surface:
Yes, I'd like to receive Word of the Day emails from YourDictionary.com
By continuing, you agree to our
Please set a username for yourself.
People will see it as Author Name with your public flash cards.