IPA: /əˈɡrɛsɪvɪti/
KK: /əˈɡrɛsɪvɪti/
The quality of being aggressive, which means showing a readiness to attack or confront; it can also refer to a forceful or hostile attitude.
His aggressivity in negotiations often led to conflicts with his colleagues.
Aggressivity is formed from "aggress-" (from Latin "aggressus", meaning to attack) and "-ivity" (a suffix used to form nouns indicating a state or condition). The word describes the state or quality of being aggressive or inclined to attack.
Think of 'aggress-' meaning to 'attack' and '-ivity' indicating a state, so aggressivity refers to the state of being inclined to attack.