Answer:
Enrich is the antonym of deprive.
Step-by-step explanation:
First, let's get our general knowledge down.
Deprive means, and I quote, "deny (a person or place) the possession or use of something."
With that out the way, let's compare our words.
Liberate is when you set someone free of something (normally jail or imprisonment of some kind). If deprive's definition was switched around a bit, then and only then would this be it's antonym.
Assert is when you state something with confidence, and sometimes force. This has nothing to do with it, so that's also off the list.
Pacify is when you lower an individual or group of people's anger or excitement. That doesn't work either.
This leaves us with enrich. Enrich is when you improve the quality of something. This works as a perfect antonym for deprive.
So enrich, which is when you enhance the quality of someone or something is the opposite of deprive, which is when you lower or deny someone or something of use.
Hope this helped!
Source(s) used: G*ogle, myself.