undue

Synonyms: disproportionate exceeding exorbitant extravagant extreme forbidden illegal ill-timed immoderate improper inappropriate inapt indecorous inept inordinate intemperate needless overmuch sinister too great too much unapt uncalled-for unconscionable underhanded undeserved unfair unfitting unjust unjustifiable unjustified unmeasurable unreasonable unseasonable unseemly unsuitable untimely unwarrantable unwarranted

Antonyms: moderate reasonable sensible