cave
[noun]
Synonyms: hollow, cavern, cavity, den, grotto

[TahlilGaran] English Synonym Dictionary ▲

I. cave¹ /keɪv/ noun [countable]
[Date: 1200-1300; Language: Old French; Origin: Latin cava, from cavus 'hollow']
a large natural hole in the side of a cliff or hill, or under the ground ⇒ caving:
the entrance to a cave

[TahlilGaran] Dictionary of Contemporary English ▲

II. cave² verb
[Date: 1700-1800; Origin: Probably from calve 'to cave in' (18-19 centuries), perhaps from Flemish inkalven; influenced by ⇒ cave¹]
cave in phrasal verb

1. if the top or sides of something cave in, they fall down or inwards
cave in on
The roof of the tunnel caved in on them.

2. to finally stop opposing something, especially because someone has persuaded or threatened you
cave in to
The chairman is expected to cave in to pressure from shareholders.

[TahlilGaran] Dictionary of Contemporary English ▲

cave
noun
ADJ. deep, large | shallow, small | dark | damp, dank | rocky, mountain, underground We explored the rocky caves along the beach.
crystal, limestone
VERB + CAVE explore
CAVE + VERB collapse a collapsed limestone cave
CAVE + NOUN ceiling, entrance, floor, mouth, roof, wall | system | art, drawing, painting | dweller
PREP. in a/the ~ We took shelter in a dark, dank cave.
PHRASES the ceiling/floor/roof/wall of a cave, the entrance to/mouth of a cave

[TahlilGaran] Collocations Dictionary ▲