Deflate

How do you deflate this vest?

How do you deflate this floaty?

Your incisive criticism will deflate a lot of egos.

We'd like to invite you to apply to our world-class university so we can artificially deflate our acceptance rate.

deflate someone's ego

Scotland's first match at a men's major finals in 23 years ended in anguish after Patrik Schick's incredible halfway-line goal helped the Czech Republic inflict a deflating opening Euro 2020 defeat at Hampden.

Never had a problem, guess I've never had to deflate multiple files!