ante       
noun [ C ] uk/ˈæn.ti/ us/ˈæn.t̬i/
 赌注
an amount of money that each person must risk in order to be part of a game that involves gambling
  a $30 ante 30美元的赌注 
 Idiom   
up the anteidiom  增加赌注;提高要求;提高风险
If you up the ante, you increase your demands or the risks in a situation in order to achieve a better result.
  The government has upped the ante by refusing to negotiate until a ceasefire has been agreed . 政府增加了砝码,在达成停火协议之前拒绝谈判。