Nothing is the antithesis of something

Nothing is the antonym of something (i.e., object, thing):

nothing: that which has no shape

(synonyms: space, vacuum)

If a thing is that which has shape, nothing is its antonym: that which doesn’t. Now we can use these two strategic terms consistently in a dissertation of Physics.

Unfortunately, there is no picture that we can post to help you visualize nothing. The reason for this is that nothing is a concept.