in·vag·i·nate /ɪnˈvæʤəˌnet/
  (vt.)(vi.)收進鞘中,套進內部
  in·vag·i·nate /ɪnˈvæʤəˌnet/ 動詞
  In·vag·i·nate v. t. To insert as in a sheath; to produce intussusception in.
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  In·vag·i·nate In·vag·i·na·ted a. Biol. (a) Sheathed. (b) Having one portion of a hollow organ drawn back within another portion.
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  invaginate
       v 1: sheathe; "The chrysalis is invaginated"
       2: fold inwards; "some organs can invaginate" [syn: introvert]