deflate
verb uk/dɪˈfleɪt/ us/dɪˈfleɪt/
(MAKE SMALLER)
[ I or T ]（使）变瘪；给…放气
If something that has air or gas inside it deflates, or is deflated, it becomes smaller because it loses the air or gas.
to deflate a balloon/tyre 给气球／轮胎放气
(WEAKEN)
[ T often passive ]削弱；使受挫
to cause something to become weaker
The party's ambitions have been deflated by the two recent by-election defeats. 最近的两次补选失利使该党的雄心受到了不小的打击。
[ T often passive ]使灰心，使泄气
to make someone lose confidence or feel less important
They were totally deflated by losing the game. 他们输掉比赛后彻底丧失了信心。
(MONEY)
[ T ]使货币紧缩，使通货紧缩
to reduce the supply of money in an economy