Unalterable

adj

adj ·5 syllables ·Moderate ·College level

Definitions

Adjective
  1. 1
    Incapable of being altered, or of changing.

    "People of unalterable ideas still insisted upon calling him "Sergeant" when they met him, which was in some degree owing to his having still retained the well-shaped moustache of his military days, and the soldierly bearing inseparable from his form."

  2. 2
    Irreversible, irrevocable.
Adjective
  1. 1
    remaining the same for indefinitely long times wordnet
  2. 2
    of a sentence; that cannot be changed wordnet
  3. 3
    not capable of being changed or altered wordnet

Synonyms

All synonyms
changelessimmutableinalterableincommutableadamantadamantine

Example

More examples

"The unalterable rhythm of mathematics is definition, theorem, proof."

Etymology

From un- + alterable.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.