Aggression.
To set upon; to attack.
To commit the first act of hostility or offense against; to begin a quarrel or controversy with someone; to make an attack against someone.
(When contrasted with sexual assault.) A physical attack of a sexual nature involving penetration (as apposed to sexual assault which may not involve actual penetration).
A broad term encompassing sexual assault, harassment, indecent assault, rape, and other sexual offences.