The word "glibnesses" refers to the quality or state of being smooth-talking, but what are its antonyms? Well, to begin with, there are several words that could be considered opposites to "glibnesses", including sincerity, honesty, and frankness. These words imply a straightforward, honest approach to communication, with little to no manipulation or cunning. Other antonyms to "glibnesses" could be thoughtfulness, sensitivity, or thought-provoking, which suggest a more mindful, intentional approach to language that prioritizes depth and substance over slickness or ease of delivery. Regardless of the particular antonym used, it's clear that "glibnesses" is best avoided if one wants to communicate clearly and authentically.