aggress \aggress"\, 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
see also:
aggressed aggressing grade