Aggress

1. n. Aggression.
2. v. i. To commit the first act of hostility or offense; to begin a quarrel or controversy; to make an attack; — with on.
3. v. t. To set upon; to attack.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.