The antonym of "inflate" is "deflate", if used to mean 'fill with air'. If 'inflate' is used as a meaning of 'exaggerate', then the antonym would be 'understate'.
Inflate
expand inflate As a adjective, inflated, full-scale, large, roomy
gain{as in weight] increase inflate expand grow enlarge volumize maximize
Inflate is a verb.
the prefix is in-
To fill with air is to inflate
Inflate it with water.
Blowfish/pufferfish inflate with water when underwater, but inflate with air when removed from that environment.
Yes, but it will not inflate very much
inflate
You can inflate objects and make them bigger by adding air to the object. Balloons and tires are objects that require air in order to inflate and make them bigger.