by 1969, originally British underworld and juvenile delinquent slang, short for aggravation in a colloquial sense "trouble or disturbance provoked by aggressive behavior or harassment" (by 1939).
I skipped it because it was too much aggro
aggression
aggressive
aggressor
aggrieve
aggrieved
aggro
*agh-
aghast
agile
agility
agin
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