D defs.my
Entry 1 sense Webster, 1913

Immutable

/ĭmˌ-yo͞ot'-əb-əl/ · Im·mu·ta·ble · IPA /ˌɪmjˈuːtəbəl/
01 a. Not mutable; not capable or susceptible of change; unchangeable; unalterable.
  1. 1.
    Not mutable; not capable or susceptible of change; unchangeable; unalterable.
    “That by two immutable things, in which it was impossible for God to lie, we might have a strong consolation.” — Heb. vi. 18.
    Immutable, immortal, infinite, Eternal King.” Milton.