(launch an attack or assault on; begin hostilities or start warfare with; "Hitler attacked Poland on September 1, 1939 and started World War II"; "Serbian forces assailed Bosnian towns all week")
(attack in speech or writing; "The editors of the left-leaning paper attacked the new House Speaker")
(take the initiative and go on the offensive; "The Serbs attacked the village at night"; "The visiting team started to attack")
(attack someone physically or emotionally; "The mugger assaulted the woman"; "Nightmares assailed him regularly")
(set to work upon; turn one's energies vigorously to a task; "I attacked the problem as soon as I got out of bed")
(begin to injure; "The cancer cells are attacking his liver"; "Rust is attacking the metal")
(disposed to attack)