grot·to
noun/ˈɡrɒtəʊ/
/ˈɡrɑːtəʊ/
(plural grottoes, grottos)
- a small cave, especially one that has been made artificially, for example in a garden
洞穴；（尤指园林等中的）石窟 Word Originearly 17th cent.: from Italian grotta, via Latin from Greek kruptē ‘a vault’, from kruptos ‘hidden’.