'aggress' originates from Latin, specifically the word 'aggredi,' where 'ad-' meant 'toward' and 'gradi' meant 'to step or go.'

'aggredi' transformed into the French word 'agresser,' and eventually became the modern English word 'aggress' through Middle English.

Initially, it meant 'to step toward or approach aggressively,' but over time it evolved into its current meaning of 'to initiate an attack or offensive action.'