The phrase "tip one's hand" refers to revealing one's strategy, intentions, or thoughts. Antonyms for this expression include hiding one's cards, keeping one's intentions secret, maintaining discretion, and adopting a poker face. These antonyms are common in competitive fields, such as business, politics, and sports, where revealing one's hand can give the opponent an advantage. By keeping one's cards close to the chest, individuals can prevent others from second-guessing them or exploiting their weaknesses. Therefore, understanding the opposite of "tipping one's hand" can be essential in maintaining a strategic edge and achieving success in high-stakes situations.