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Synonyms

inflate

American  
[in-fleyt] / ɪnˈfleɪt /

verb (used with object)

inflated, inflating
  1. to distend; swell or puff out; dilate.

    The king cobra inflates its hood.

    Antonyms:
    deflate
  2. to cause to expand or distend with air or gas.

    to inflate a balloon.

  3. to puff up with pride, satisfaction, etc.

  4. to elate.

  5. Economics. to expand (money, prices, an economy, etc.) unduly in amount, value, or size; affect with inflation.


verb (used without object)

inflated, inflating
  1. to become inflated.

  2. to increase, especially suddenly and substantially.

    The $10 subscription has inflated to $25.

inflate British  
/ ɪnˈfleɪt /

verb

  1. to expand or cause to expand by filling with gas or air

    she needed to inflate the tyres

  2. (tr) to cause to increase excessively; puff up; swell

    to inflate one's opinion of oneself

  3. (tr) to cause inflation of (prices, money, etc)

  4. (tr) to raise in spirits; elate

  5. (intr) to undergo economic inflation

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Related Words

See expand.

Other Word Forms

  • inflatedly adverb
  • inflatedness noun
  • inflater noun
  • inflator noun
  • overinflate verb (used with object)
  • reinflate verb

Etymology

Origin of inflate

First recorded in 1500–20; from Latin inflātus, past participle of inflāre “to blow on or into, puff out,” equivalent to in- in- 2 + flā- blow 2 + -tus past participle suffix

Explanation

Using your own breath or an air pump, you can inflate a balloon — or anything else you need to pump air into. When you inflate something you fill it with air (or any other gas) to make it expand. From the Latin verb inflāre, "to blow into," the word inflate appeared in English in the early 16th century. Although we usually think of the word inflate as referring to blowing air or gas into a balloon or a tire, anything that grows larger, from food prices to an egoist's self-image, can be inflated. When an item becomes scarce, its price is likely to be inflated.

Keep Reading on Vocabulary.com

Vocabulary lists containing inflate

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Charities are urging people not to turn their heating off as the war in Iran continues to inflate energy prices.

From BBC • Mar. 26, 2026

“We will continue to hold accountable insurers that knowingly submit inaccurate or unsupported diagnoses to improperly inflate reimbursement,” Shumate said in a statement.

From Barron's • Mar. 11, 2026

Many insurers use credit information to determine the price of both home and auto coverage — meaning a lower score can inflate these bills, which are some of the largest in a household budget.

From MarketWatch • Mar. 4, 2026

And more importantly, he didn’t inflate it into a referendum on the character of New Yorkers.

From Slate • Feb. 28, 2026

He gave me the ball back and I did as he said, pointing my finger toward that little hole where you stick the pin in to inflate the ball.

From "The Million Dollar Shot" by Dan Gutman