底牌 Traditional form: 底牌 Pinyin (reading): dǐpái Definitions: cards in one's hand (fig.) undisclosed strength or information hidden trump Characters: 底 - bottom, underside; below, underneath 牌 - card, game piece; placard, signboard, tablet Traditional characters: 底 - bottom, underside; below, underneath 牌 - card, game piece; placard, signboard, tablet