Gloppiest refers to something that is wet, sloppy, or messy. The antonyms for this word would be neat, tidy, dry, and clean. In order to convey the opposite meaning of glop, one can use various synonyms like "neat" which means orderly, tidy and well-organized, "tidy" which means neat and clean, "dry" which means free from moisture or dampness, and "clean" which means free from dirt, filth, or stains. Using these antonyms one can portray a sense of tidiness and cleanliness, which is the direct opposite of something being gloppy and messy. It's essential to have a good command of antonyms as it helps in creating effective communication.