What is the antonym for thing?

There isn't one perfect antonym for "thing" because it's a very broad and general term. However, depending on the context, you could use words like:

* Idea: If "thing" refers to a concept or thought.

* Person: If "thing" refers to a living being.

* Nothing: If you want to express the absence of something.

* Abstract: If "thing" refers to a tangible object.

* Action: If "thing" refers to an event or activity.

* Non-entity: If "thing" refers to something insignificant or unimportant.

It's important to consider the specific context in which you are using "thing" to choose the best antonym.