Expose is a common word that refers to revealing or making something visible. However, there are numerous antonyms for expose that can change the meaning of a sentence. The antonyms for expose could be words such as conceal, hide, cover, mask, withhold, or obscure. For example, if you conceal something, you are keeping it hidden and away from view. On the other hand, if you expose something, you are bringing it into the open and making it visible. So, the right antonym of the word "expose" depends on the context of the sentence in which it is used.