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

Newman said it was particularly concerning for the native endangered water vole, which he described as the snapping turtle's "top snack".

From BBC • Jun. 9, 2026

The International Atomic Energy Agency said it was dispatching a team to inspect the damage, calling the incident "deeply concerning".

From Barron's • Jun. 7, 2026

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

Most concerning to dealers: the biggest loss of business came from customers with cars that are two to five years old, vehicles typically under warranty.

From The Wall Street Journal • Jun. 6, 2026

Maria also kept her eye out for any books concerning insects.

From "The Girl Who Drew Butterflies: How Maria Merian's Art Changed Science" by Joyce Sidman