deflate

From Wiktionary

Word parts[change]

de- + inflate

Pronunciation[change]

Verb[change]

Plain form
deflate

Third-person singular
deflates

Past tense
deflated

Past participle
deflated

Present participle
deflating

A deflated balloon.
  1. (transitive) If you deflate something, you remove air from something that is elastic, e.g. a balloon.