unchecked

British  

/ ʌnˈtʃɛkt /

adjective

1. not prevented from continuing or growing

   unchecked population growth

2. not examined or inspected

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adverb

1. without being stopped or hindered

   the virus could spread unchecked

2. without being examined or inspected

   our luggage passed unchecked through customs

Explanation

If something isn't held back or restrained, it's unchecked, like the unchecked growth of the weeds in your neighbor's garden. Use unchecked to describe things that are increasing or growing, especially if they're unwanted. The unchecked sprawl of a city might result in the loss of animal habitats, and your class's unchecked chatter will eventually make it impossible for you to hear the teacher when he tries to get your attention. This word comes from the verb check, "to hold or control," the way you control your opponent's king in a game of chess by putting it in check.

Example Sentences

The European Commission, in charge of EU trade policy, says the step is about slashing the financial burden on customs duties after the explosion in imports, and tackling the safety risks from unchecked goods.

From Barron's • Jun. 30, 2026

Some whose homes and businesses survived are increasingly concerned about the risks posed by surrounding lots consumed by unchecked vegetation.

From Los Angeles Times • Jun. 26, 2026

Salim says that both show the dangers of allowing pride to fester and swell unchecked.

From Salon • Jun. 21, 2026

The U.S. withdrawal from international agencies and the strain USAID’s end put on surveillance and response systems were key to allowing Ebola to spread unchecked, several experts told me.

From Slate • Jun. 9, 2026

The place had probably looked good once, but now unchecked ivy grew up its sides.

From "Made You Up" by Francesca Zappia

Related Words

• rampant
• unbridled
• unhampered