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

The US embassy said it had "received information concerning a potentially significant air attack that may occur at any time over the next 24 hours".

From Barron's • May 24, 2026

If there’s anything I’ve learned about the recent influx of food trends and niche products, it’s that they’re bizarre — and getting more concerning.

From Salon • May 23, 2026

The effect may be more concerning for people who already have hypertension or existing heart or liver disease.

From Science Daily • May 18, 2026

“That makes it all the more concerning for those using weight-loss drugs in an ad hoc or unregistered way.”

From The Wall Street Journal • May 17, 2026

Each new question, each new catechism chapter, each new story seemed to open up a thousand facets concerning the salvation of my soul.

From "Bless Me, Ultima" by Rudolfo Anaya