DictionaryjustifiableDefensible as reasonable or right
adjective

justifiable

jus-tuh-FY-uh-buhl/ˌdʒʌstɪˈfaɪəbl/

Able to be defended as reasonable or right.

Breaking the car window is justifiable to rescue the occupant trapped inside the burning vehicle.

Breaking a car window is visibly justified by the need to rescue a trapped occupant from a burning vehicle: the dangerous situation and otherwise destructive action appear together.
Etymology

The roots behind justify mean “make just,” but the verb developed the sense “show to be right.” Something justifiable can therefore be defended as reasonable or morally acceptable.

In context

The Ethical Compass1:43
it might be morally justifiable to take action against this person if it is the only way to prevent harm to others even though the person themselves is innocent
Is There Ever a Justifiable Reason to Kill Someone? | The Ethical Compass

More examples

  • The extra cost is justifiable if the repairs prevent future damage.
  • He feels justifiable anger when someone takes credit for his work.
  • A minor inconvenience is not a justifiable reason to cancel.

Forms

justifiable

justify verb — To show that something is reasonable or right.

justifiably adverb — With good reason or adequate justification.

Similar words

defensible
Emphasizes support through arguments, not necessarily moral rightness.
reasonable
Emphasizes sound judgment rather than the ability to defend something.
warranted
Emphasizes sufficient grounds in the particular circumstances or evidence.