The antonyms of "most smooth-spoken" can vary depending on the context. Some examples may include: clumsy, awkward, stammering, halting, blunt, curt, abrasive, harsh, inarticulate, or unpolished. Smooth-spoken typically refers to someone who is charming, persuasive, and able to articulate their thoughts clearly and cohesively. Therefore, antonyms might describe individuals who struggle to communicate effectively, lack social skills, or have difficulty expressing themselves verbally. When trying to express an opposite of smooth-spoken, it is essential to consider the specific situation, since various antonyms may apply depending on the context.