adjective

done without good reason; uncalled for.

gratuitous violence

unjustified,without reason,uncalled for,unwarranted,unprovoked,undue,indefensible,unjustifiable,needless,unnecessary,superfluous,redundant,avoidable,inessential,non-essential,unmerited,groundless,ungrounded,causeless,without cause,senseless,careless,wanton,indiscriminate,unreasoning,brutish,excessive,immoderate,disproportionate,inordinate,unfounded,baseless,inappropriate,de trop