immutable
im-MYOO-tuh-bul
/ɪˈmjuːtəbl/
Unchanging over time or unable to be changed.
A very strong word, often used for laws of nature or absolute truths.
The story behind the word. From Latin 'immutabilis'. The root 'mutare' (to change) is the same one found in 'mutation' and 'mutant'.
Word relationships
- unchangeable: Unchangeable is the plain English version; immutable is more formal and authoritative.
- mutable: Mutable means liable to change; immutable means the opposite.
Commonly confused with
- permanent: Permanent means intended to last; immutable means it cannot be different.
Word family
- immutability (noun): The state of being unable to be changed.
- immutably (adverb): In a way that cannot be changed.
Collocations
- immutable laws
- immutable truth
- immutable fact
Example sentences
- "The immutable laws of the universe dictate that energy cannot be created or destroyed." Describing the laws of physics.
Memory hook
Immutable = Im (not) + Mutable (changeable). Like a 'mute' button—once it's on, the sound doesn't change. Cannot be changed.
When not to use
Don't use it for things that could change but just haven't yet; it implies that change is impossible.
Fun facts
- In computer programming, an 'immutable object' is an object whose state cannot be modified after it is created.
Explore more words
irrevocable, mutable, inevitable, perpetual, incorruptible, Inalienable
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