Hugger-mugger is an old-fashioned term that refers to secret or clandestine behavior. To find antonyms for this word, we need to look for words that represent openness or transparency. Words like open, frank, candid, and straightforward are all antonyms of hugger-mugger. Other possible antonyms for this word may include honest, direct, forthright, and sincere. Essentially, any word that reflects forthright behavior or honesty serves as an antonym for hugger-mugger. The point is to use language to communicate honestly and openly with others, rather than engaging in sneaky or secretive behavior.