aggress (third-person singular simple present aggresses, present participle aggressing, simple past and past participle aggressed)
1.to commit the first act of hostility or offense; attack first.
2.to begin to quarrel.
3.to behave aggressively toward; attack (often followed by upon), wild animals aggressing their prey.
1. (intransitive) to attack first or begin a quarrel Word OriginC16, from Medieval Latin aggressāre to attack, from Latin aggredī to attack, approachCollins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollinsPublishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Cite This Source
"attack," 1714, back-formation from aggression, but used earlier with a sense of "approach" (1570s) and in this sense from French aggresser, from Late Latin aggressare, frequentative of Latin aggredi "to approach, attack." Related, Aggressed; aggressing.
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