a person who transgresses moral or civil law

begin to injure

set to work upon; turn one's energies vigorously to a task

attack in speech or writing

take the initiative and go on the offensive

launch an attack or assault on; begin hostilities or start warfare with

an attacker who waits in a concealed position to launch a surprise attack

someone who takes vengeance

a cruelly rapacious person

an assailant who uses a bludgeon

a cruel and brutal fellow