Word Nerd Alert: Immutable

October 26, 2026 1 min read

Adjective · \(ˌ)i(m)-ˈmyü-tə-bəl\

: not capable of or susceptible to change

“the immutable laws of nature”

Roots

Middle English, from Latin immutabilis, “unchangeable” (in- “not” + mutabilis “changeable”)

Close cousins

changeless

Opposites

mutable, nonimmutable

First known use

15th century

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