cocoon (v.)youdaoicibaDictYouDict[cocoon 词源字典]
1986, "to stay inside and be inactive," from coccoon (n.).
A lady with an enchanting name, Faith Popcorn, has identified a menacing new American behavior that she gives the sweet name of 'cocooning.' It threatens the nation's pursuit of happiness, sometimes called the economy. [George Will, April 1987]
Related: Cocooned; cocooning.[cocoon etymology, cocoon origin, 英语词源]