Last Updated：2025/11/19

Unable to be changed without exception. / (programming, of a variable) Not able to be altered in the memory after its value is set initially.

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immutable

Source Word

immutable

Adjective

not-comparable of a variable

Japanese Meaning

変更不可能な / 不変の

The contract's immutable terms meant neither party could alter the agreement under any circumstance.

契約の変更できない条項により、いかなる場合でもどちらの当事者も合意を変更することはできなかった。

Sense（1）

Unable to be changed without exception.

The government has enacted an immutable law.

Sense（2）

(programming, of a variable) Not able to be altered in the memory after its value is set initially.

Constants are immutable.