What is the antonym for talk?

There isn't one single perfect antonym for "talk," as the word has many meanings and contexts. Here are some possibilities, depending on the specific meaning you're looking for:

For general communication:

* Silence: This is the most direct opposite of talking.

* Listen: The act of receiving information rather than giving it.

* Write: Communicating through written words.

* Sign: Communicating through gestures.

For specific types of talk:

* Whisper: The opposite of shouting.

* Yell: The opposite of speaking softly.

* Argue: The opposite of agreeing.

* Lie: The opposite of telling the truth.

* Gossip: The opposite of discussing important matters.

* Brag: The opposite of being modest.

For other senses of the word:

* Action: If you are "talking about" doing something, the opposite would be to actually "do" it.

* Ignore: The opposite of paying attention.

* Avoid: The opposite of approaching or engaging.

The best antonym for "talk" depends on the specific context and the meaning you want to convey.