Dictionary entry

Immutability; Immutable

International Standard Bible Encyclopedia

i-mu-ta-bil'-i-ti, i-mu'-ta-b'-l (ametathetos): Occurs inHeb 6:17,18of the unchangeableness of the Divine counsel. It is the perfection of Yahweh that He changes not in character, will, purpose, aim (Mal 3:6; so of Christ,Heb 13:8).

SeeFAITHFULNESS;UNCHANGEABLE.