The word "conceal" means to hold back or hide something. Its antonyms are words that express the opposite meaning. The first antonym for conceal is "reveal," which means to make something known. Another antonym is "expose," which means to uncover or bring to light. "Disclose" is another antonym, which means to reveal or make something known that was previously hidden. "Uncover" is also an antonym for conceal, as it means to make something visible or accessible. Lastly, "unveil" is an antonym for conceal, which means to reveal or uncover something previously hidden or secret.