"to emphasize (something) too much," 1933, a metaphor from card games, in to overplay (one's) hand, "to spoil one's hand by bidding in excess of its value" (1926), from over- + play (v.). The word was used earlier in a theatrical sense. Related: Overplayed; overplaying.
权威例句
1. The United States has to be careful it doesn't overplay its hand.
美国必须谨防高估自身实力。
2. You must not overplay his part in the negotiations.
你不可过高估计他在谈判中的作用.
3. The Japanese diplomat was careful not to overplay his hand during the negotiations.