What word is a antonym of passive?

There are many antonyms for "passive", depending on the context. Here are a few options:

General antonyms:

* Active

* Dynamic

* Energetic

* Aggressive

* Assertive

* Proactive

* Vigorous

Antonyms specific to certain contexts:

* Aggressive (in a confrontational context)

* Vocal (in a communication context)

* Interfering (in a relationship context)

* Intervening (in a situation context)

* Resistant (in a response context)

The best antonym for "passive" will depend on the specific situation and what you are trying to convey.