unwarrantable

Adjective

Synonyms: indefensible insupportable unjustifiable unwarranted

WordNet 3.0

Adjective (1)

incapable of being justified or explainedSynonyms: indefensible insupportable unjustifiable unwarranted

Webster's Dictionary (GCIDE)

Unwarrantable \Un*war"rant*a*ble\, a. Not warrantable; indefensible; not vindicable; not justifiable; illegal; unjust; improper. -- Un*war"rant*a*ble*ness, n. -- Un*war"rant*a*bly, adv. [1913 Webster]