"In card" is not a word. However, "in" and "card" are individual words with their own set of antonyms. "In" can have antonyms such as out, outside, or beyond, while "card" can have antonyms like open, close, or shut. Antonyms are words that have the opposite meaning of another word, and they can be useful in communication to convey a specific meaning or idea. Knowing antonyms can help you expand your vocabulary and improve your ability to express yourself effectively. In summary, "in card" is not a word, but "in" and "card" each have their own set of antonyms.