The antonym for the word "chitchatted" can be "remained silent," "ignored," "avoided," "neglected," "ignored," or "muted." When we say someone "chitchatted," we often refer to a casual conversation, perhaps engaging in idle gossip and small talk. However, there can be situations where we choose not to engage in any conversation or just choose to stay quiet instead. So, depending on the context and the situation, we can choose the best antonym for the word "chitchatted." In any case, it is always good to communicate respectfully and mindfully.