All Words
Sunday, February 8, 2026
Word of the Day

immutable

adjective

Unchanging over time or unable to be changed; fixed and permanent.

Intermediate - Known to most educated speakers

Etymology

From Latin immutabilis meaning "unchangeable," from in- (not) + mutabilis (changeable), from mutare (to change).

Examples in Use

  • 1.

    "The laws of physics appear to be immutable throughout the universe."

  • 2.

    "Her commitment to justice was immutable despite political pressure."

  • 3.

    "The contract contained immutable terms that could not be renegotiated."

Related Vocabulary

Synonyms

unchangingfixedpermanentconstantunalterable

Related Words

stableinvariablesteadfastenduring

Fun Fact

In programming, immutable data structures cannot be modified after creation - any "change" creates a new copy. This concept, borrowed from mathematics, helps prevent bugs and makes code more predictable.

Word Game Tips

Letters: 9 letters (I, M, M, U, T, A, B, L, E)

Scrabble Value: 15 points

Tip: Words ending in "LE" are often good scoring opportunities.

Put Your Vocabulary to the Test!

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