What is the opposite of word reserved?

The opposite of "reserved" depends on the context in which you are using it. Here are a few possibilities:

General opposite:

* Outspoken

* Forthright

* Open

* Uninhibited

* Extroverted

Opposite in terms of behavior:

* Outgoing

* Friendly

* Talkative

* Gregarious

* Sociable

Opposite in terms of being careful with resources:

* Lavish

* Extravagant

* Profligate

* Wasteful

* Indiscreet

Opposite in terms of holding back or keeping something:

* Giving

* Generous

* Liberal

* Openhanded

It's important to consider the specific situation to determine the most appropriate opposite word for "reserved."