The antonyms for the word "most nonvocal" could include words like talkative, vocal, vocalized, communicative, expressive, and articulate. These words show the opposite meaning of "most nonvocal" which refers to a person who is silent, uncommunicative, or restrained in their speech. Someone who is talkative or communicative can easily convey their thoughts and feelings through words, while a person who is nonvocal is usually difficult to read, making communication challenging. Being articulate or expressive allows a person to communicate their ideas clearly and effectively, while someone who is nonvocal may struggle to do so.