Kibitzes is a word that means to offer unsolicited advice or comments, particularly during a game or activity. Some antonyms for this word might include remaining silent, minding one's own business, or refraining from commenting. Other antonyms may include offering helpful advice, productive criticism, or constructive feedback. In some cases, these antonyms may be more appropriate than simply refraining from speaking, particularly if the situation calls for active engagement or feedback. Ultimately, the most effective approach will depend on the circumstances and the needs of the individuals involved.