The word "blabbered" refers to someone who speaks too much, often revealing secrets or talking nonsense. Antonyms for this word would include words like "quiet," "silent," "reticent," and "reserved." These words indicate a person who is reluctant to speak or prefers to keep their thoughts and feelings to themselves. Other antonyms could include words like "discreet," "guarded," or "circumspect," which suggest someone who is careful about what they say and how they say it. These antonyms are useful when describing different personalities or communication styles, and demonstrate the importance of balancing speaking and listening in everyday interactions.