If you mean "to enclose or surround"
* Expose: This is a good antonym if you're talking about physically surrounding something.
* Uncover: This suggests revealing something hidden or enclosed.
* Open: This could be used for something that was previously closed.
If you mean "to summarize or condense"
* Expand: This would be the opposite of condensing information.
* Elaborate: This implies providing more detail.
* Disseminate: This means to spread information widely, rather than summarizing it.
* Diffuse: This suggests making information less concentrated.
If you mean "to characterize or embody"
* Misrepresent: This is the opposite of accurately representing something.
* Distort: This means to twist or alter something in a way that is not true.
* Contradict: This means to say or do something that goes against something else.
The best antonym for "encapsulate" will depend on the specific context in which you're using the word.