cocooning

/K AH0 K UW1 N IH0 NG/
verb
  1. 1

    To envelop in a protective case

  2. 2

    To withdraw into such a case.

noun
  1. 1

    The formation of a cocoon.

Source: https://en.wiktionary.org/wiki/cocoon, https://en.wiktionary.org/wiki/cocooning