Related Clues:

• Flat
• Puncture
• Collapse
• Take down, in a way
• Let down
• Pop, as a balloon
• Crestfallen
• Opposite of blow up
• Let some air out of
• Rendered ineffective
• Let the air out of
• Punctured
• Take the air out of
• Depressed like punctured balloon
• Collapsed due to release of gas