take the wind out of somebody's sailsinformalCONFIDENT to make someone lose their confidence, especially by saying or doing something unexpected 〔尤指以意想不到的言语或行动〕使某人丧失信心,使某人泄气take the wind out of somebody’s sails• Last night's defeat has taken some of the wind out of the team's sails.
→ take the wind out of somebody’s sails at wind1(2)