aggress definition by Webster's New World
Origin: ; from Classical Latin aggressus, past participle of aggredi, to attack, go to ; from ad-, to plush gradi, to step
aggress definition by American Heritage Dictionary
intransitive verb ag·gressed, ag·gress·ing, ag·gress·es
Origin: French agresser, from Latin aggredī, aggress-, to attack : ad-, ad- + gradī, to go; see ghredh- in Indo-European roots.