infold
verb
in·fold in-ˈfōld 
infolded; infolding; infolds
transitive verb
: enfold, envelop
intransitive verb
: to fold inward or toward one another
Word History
First Known Use
15th century, in the meaning defined at transitive sense
Medical Definition
infold
transitive verb
in·fold in-ˈfōld
: to cover or surround with folds or a covering
infold the hernial sac with sutures
intransitive verb
ˈin-ˌ
: to fold inward or toward one another the neural crests infold and fuse