Holding tongue, also called refraining from speaking, is a useful skill to have, but sometimes we need to express our thoughts and feelings. Some antonyms to holding tongue could be expressing one's opinion, speaking out, or giving voice to one's beliefs. Sometimes, it's necessary to be frank, candid, or outspoken about a topic, especially if it affects us directly. Other antonyms might include disclosing, revealing, and confessing, which involve disclosing information that was previously kept private. However, it's crucial to balance honesty and diplomacy when communicating, as hurting someone's feelings or causing unnecessary distress is not ideal. In conclusion, there are times to hold one's tongue and times to speak up, but both require mindfulness and discernment.