Gleamingly is an adverb that describes something that shines or sparkles brilliantly. Its antonyms are words that express the opposite meaning. Dull and drab are two common antonyms for gleamingly. Dull is used to describe something that is not shiny, bright, or colorful. On the other hand, drab is used to describe something that is uninteresting, boring, and lacking any distinctive feature or color. Other antonyms for gleamingly include murky, cloudy, and dingy. These words are used to describe things that are murky, unclear, or unclean, which is the complete opposite of the shimmering, clear, and bright appearance of something that is gleamingly.