Also means
assertive
Usage Note
Agresivo can describe hostile, violent behaviour but also—especially in business or marketing contexts—bold, assertive, or competitive strategy (una campaña publicitaria agresiva). The four forms are agresivo / agresiva / agresivos / agresivas. The adverb is agresivamente.
Examples
"El perro se puso agresivo con los extraños."
Natural Translation
The dog became aggressive with strangers.

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