Immutable

adj. Never changing or varying; unchangable

Synonyms

  • fixed
  • established
  • permanent

Antonyms

  • flexible
  • mutable
  • variable

Sentences

  • After Jim's car accident, he was told that his loss of memories was immutable.
  • No matter how much she studied, it seemed that Sally's low grades were immutable.
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Aquarium that requires NO water changes!