動詞 invaginate:

1. sheathe
2. fold inwards
   同義詞：introvert

in.vag.i.nate

v.（動詞）
in.vag.i.nat.ed,in.vag.i.nat.ing,in.vag.i.nates
v.tr.intr.（及物動詞和不及物動詞）
To enclose or become enclosed in or as if in a sheath.
（使）入鞘：裝入鞘中或為鞘所圍
To turn or become turned inward.
（使）內轉：彎得或成為向內彎
To infold or become infolded so as to form a hollow space within a previously solid structure, as in the formation of a gastrula from a blastula.
套疊：折疊或變成折疊以便在原先實心的結構中形成一個中空的空間，如囊胚形成原腸胚的過程

來源：
Medieval Latin inv3gon3re inv3gon3t-
中世紀拉丁語 inv3gon3re inv3gon3t-
Latin in- [in] * see in- 2
拉丁語 in- [在…里面] *參見 in-2
Latin v3gona [sheath]
拉丁語 v3gona [鞘]