What is the antonym for sigh?

There isn't one single perfect antonym for "sigh" because it can be used in various ways.

Here are some possible antonyms depending on the context:

If "sigh" represents sadness or disappointment:

* Laugh

* Smile

* Cheer

* Rejoice

If "sigh" represents weariness or boredom:

* Energize

* Excite

* Enthusiasm

* Rejuvenate

If "sigh" represents relief:

* Worry

* Dread

* Fear

* Anxiety

Ultimately, the best antonym for "sigh" depends on the specific context of how it is being used.