Cocoon
WordNet
noun
(1) Silky envelope spun by the larvae of many insects to protect pupas and by spiders to protect eggs
verb
(2) Wrap in or as if in a cocoon, as for protection
(3) Retreat as if into a cocoon, as from an unfriendly environment
"Families cocoon around the T.V. set most evenings"
"She loves to stay at home and cocoon"