concerning

American  

[kuhn-sur-ning] / kənˈsɜr nɪŋ /

preposition

1. relating to; regarding; about.

   We attended a discussion concerning foreign aid.

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adjective

1. causing concern, worry, or anxiety.

   The increase in unlicensed practitioners is concerning.

   The more concerning elements of the sport were swept under the rug.

concerning British  

/ kənˈsɜːnɪŋ /

preposition

1. about; regarding; on the subject of

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adjective

1. worrying or troublesome

Etymology

Origin of concerning

First recorded in 1375–1425; concern ( def. ) + -ing ² ( def. )

Compare meaning

How does concerning compare to similar and commonly confused words? Explore the most common comparisons:

• disconcerting vs. concerning

Example Sentences

These organisms, known as free living amoebae, are found in water and soil, but scientists say some species are becoming increasingly concerning as the world warms and water systems age.

From Science Daily • Jun. 6, 2026

“We have heard that you were promised in Alaska the resolution of certain issues concerning Ukraine and Europe,” Zelensky wrote, referring to Putin’s August summit with Trump.

From The Wall Street Journal • Jun. 5, 2026

With a year to go until the World Cup starts in Brazil, this was a concerning scoreline that gives Wiegman plenty to ponder.

From BBC • Jun. 5, 2026

Citizenship and Immigration Services’ sudden release of a memo concerning the processing of green-card applications filed within the United States.

From Slate • Jun. 5, 2026

He wanted to draw Blount out completely so that he could understand certain questions concerning him.

From "The Heart is a Lonely Hunter" by Carson McCullers