cave-in is cave in's Singular

cave in

US 
UK 
  • n.(突然的)塌陷
  • Web塌方;陷落;坍塌
Singular:cave-in  Plural Form:cave-ins  
cave-in
n.
1.
(突然的)塌陷,坍塌,倒塌the fact of sth suddenly collapsing

Sample Sentence

Definition:
Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical
Source:AllAll,DictionaryDictionary,WebWeb
Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard