Silver-tongued is a phrase used to indicate someone who is eloquent and persuasive, often using language to charm or influence others. Some possible antonyms for this word include clumsy, inarticulate, awkward, clumsy, muddled, or halting. Those who are not silver-tongued may struggle to find the right words to express themselves or may lack the communication skills needed to persuade others. Instead of using smooth and charismatic language, they may stumble over their words or struggle to make their point. These individuals may lack the confidence or social skills required to be persuasive or convincing, and may struggle to communicate their ideas effectively.