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

But that one-time financial boost will fade, signaling more trouble could be brewing if inflation, already near 4%, keeps rising unchecked.

From MarketWatch • Jun. 5, 2026

There will be searching questions about how such an audacious crime could have gone unnoticed and unchecked for more than a decade, and vindication for the detectives who decided they needed that tent.

From BBC • May 25, 2026

She said Airbnb, as a tech example, has gone unchecked despite causing “a lot of the removal of housing stock.”

From Los Angeles Times • May 18, 2026

“One thing Devin is not is an unchecked autonomous system,” he said.

From The Wall Street Journal • May 14, 2026

Disease spread unchecked, weakening, crippling, and killing indiscriminately.

From "The Boy on the Wooden Box" by Leon Leyson

Related Words

• rampant
• unbridled
• unhampered