Aggress \Ag*gress"\, v. i. [imp. & p. p. {Aggressed}; p. pr. &
vb. n. {Aggressing}.] [L. aggressus, p. p. of aggredi to go
to, approach; ad + gradi to step, go, gradus step: cf. OF.
aggresser. See {Grade}.]
To commit the first act of hostility or offense; to begin a
quarrel or controversy; to make an attack; -- with on.
[1913 Webster]
2. take the initiative and go on the offensive, as in a game.
Syn: attack
[WordNet 1.5]