Contriturate, a word that means to crush or grind something into a fine powder, has several antonyms that denote the opposite meaning. One such antonym is "coagulate," which refers to the process of transforming a liquid into a solid mass. Another antonym is "build." Building connotes constructing something piece by piece or layer by layer, which is the opposite of breaking something down into small fragments. "Join" is another antonym for contriturate, which implies linking or connecting two or more things to form a single unit. Finally, "assemble" means putting together separate parts or pieces to create a new whole, while contriturate means reducing something to small particles.