Part of speech: adjective
Origin: Middle English, 15th century
Unchanging over time.
Unable to be changed.
Examples of Immutable in a sentence
"The mission of the nonprofit has remained immutable since its founding."
"You can try to change his mind, but I think he's immutable."
In Latin, "mutare" means to change. You'll recognize that from your favorite mutant superheros, the X-Men. Add on the Latin prefix "im" for not, and you get the unchanging immutable. If you're immutable, there's no chance of shapeshifting or any other superpowers.
Did you Know?
There are a batch of words that can be traced back to the Latin root of "mutare." Immutable is unchanging, but mutate means to undergo significant changes, permute is to change the order, and transmute is to change in nature or appearance. Change is good!