This is the 9880th most frequent Russian word.
агрессивным
Aggressive.
Here, 'агрессивной' describes the dog's perceived behavior or demeanor.
Собака выглядела агрессивной, но на самом деле была дружелюбной.
The dog looked aggressive, but actually was friendly.
In this sentence, 'агрессивным' refers to a person's emotional or behavioral response in a threatening situation.
Он стал агрессивным, пытаясь защитить свою семью.
He became aggressive trying to protect his family.
This usage of 'агрессивной' metaphorically describes the intense and overwhelming nature of the campaign.