What is the antonym of word Indecesive?

The antonym of indecisive depends on the context, but here are some possibilities:

General antonyms:

* Decisive

* Resolute

* Determined

* Firm

* Unwavering

* Assertive

More specific antonyms:

* Sure (if the context is about certainty)

* Confident (if the context is about self-assurance)

* Prompt (if the context is about quick action)

* Swift (if the context is about speed of decision-making)

The best antonym for "indecisive" will depend on the specific situation and the meaning you want to convey.