the world > movement > progressive motion > moving along with hands and feet or with body prone > move along with hands and feet or with body prone [verb (transitive)] > creep or crawl along, over, or under (4)
transitive. To crawl upon or over. Obsolete. rare.
transitive. = creep along or over. rare. (Cf. also to creep the cross at sense 1c).
(under-, prefix1 affix 2a(b).)