IMMUTABILITY
n.[L. immutabilitas; in and mutabilis, mutable, from muto, to change. ] Unchangeableness; the quality that renders change or alteration impossible; invariableness. Immutability is an attribute of God.
Im *mu `ta *bil "i *ty, n. Etym: [L. immutabilitas: cf. F. immutabilité. ]
immutability
im m ù ta b í l i ty 名詞 U 不変 (性 ).