The term "more fullmouthed" refers to someone who speaks in a confident, forceful manner. In contrast, antonyms for this term might include words like timid, quiet, or reserved. These qualities describe someone who speaks softly or hesitantly, lacking the assertiveness and power associated with a fullmouthed speaker. Other antonyms might include words like meek, unassuming, or deferential, which suggest a willingness to defer to others rather than assert one's own opinions or ideas. Regardless of the antonym used, it is clear that these terms describe a very different style of communication from the bold, confident speech of a fullmouthed speaker.