Which term describes something that cannot be retracted or revoked?

The term that describes something that cannot be retracted or revoked is "irrevocable." This means that once a decision, action, or agreement has been made, it cannot be undone or changed. For instance, in legal or financial contexts, an irrevocable decision, such as an irrevocable trust, cannot be modified or terminated without the consent of all parties involved or under specific conditions.

In contrast, the term "permanent" suggests that something lasts indefinitely, but it doesn’t necessarily convey the inability to change or reverse it in the same way that "irrevocable" does. "Alterable" refers to something that can be changed or modified, which is the opposite of irremovability. "Temporary" indicates a limited duration, suggesting that something can and will end or change, thus opposing the idea of being unchangeable. The specificity of "irrevocable" makes it the most accurate term for describing something that cannot be retracted or revoked.