What does unjustifiable mean?
Unjustifiable is an adjective describing an action, claim, decision, or criticism that cannot be supported by adequate evidence, reasoning, or moral justification. It is commonly used in legal and public debate, where an accusation, restriction, intervention, or interpretation may be dismissed because there is no defensible basis for it. The word is more specific than unfair, which can simply mean undeserved or wrong, and more categorical than unjustified, which says that justification is lacking. “Unjustifiable” implies that the matter cannot be rescued by supplying a better explanation or stronger evidence. Its formal tone makes it especially appropriate for arguments concerning law, ethics, public policy, and logic, although it also occurs in general discussion. Understanding the word clearly can help distinguish a serious objection—one based on reasoning—from a vague complaint or personal objection. In this way, unjustifiable is valuable not only for criticism but also for evaluating whether a position has a rational foundation.
adjectiveNot capable of being justified or defended by adequate evidence or reason. Lacking a valid logical, factual, or moral basis.
- Unable to be justified, defended, or supported by adequate evidence or reasoning.
"The committee rejected the accusation as unjustifiable because no reliable evidence supported it."
"The delay was wholly unjustifiable and could not be explained by any operational requirement."
"Her lawyer characterized the search as an unjustifiable intrusion into the client's private affairs."
Sometimes an argument fails not because it is merely weak, but because no adequate reason can defend it at all.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does unjustifiable come from?
The English word was formed by combining the negative prefix un- with justifiable. The underlying root is Latin justificare, meaning “to justify” or “to declare righteous,” which was built on justus, meaning “just, rightful, or lawful,” together with a suffix meaning “to make.” The same Latin foundation produced English cognates including just, justice, justify, and justification.
Related word forms
How unjustifiable is actually used
A formal word used particularly in legal, academic, ethical, and argumentative contexts. It is stronger and more specific than merely calling something unfair, because it emphasizes the impossibility of providing a sufficient defense or rationale.
Easily confused with unjustifiable
Unjustified means lacking sufficient justification, whereas unjustifiable means that justification or adequate grounds are impossible to supply.
Unjust describes something that is wrong, unfair, or undeserved, while unjustifiable focuses specifically on the absence of a defensible reason.