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tendinitis

American  
[ten-duh-nahy-tis] / ˌtɛn dəˈnaɪ tɪs /
Also tendonitis,

noun

Pathology.
  1. inflammation of a tendon.


tendinitis British  
/ ˌtɛndəˈnaɪtɪs /

noun

  1. inflammation of a tendon

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of tendinitis

1895–1900; < New Latin tendin- ( see tendinous) + -itis


Explanation

Tennis players who overexert themselves might experience pain and swelling in their elbows, a sign they could be dealing with tendinitis — inflammation of the connective fiber within their joints. Tendinitis is a condition where a tendon, the thick cord that connects muscle to bone, becomes inflamed due to overuse or injury. The word tendinitis comes from the Latin word tendo, meaning "stretch," and the suffix -itis, which indicates inflammation. This condition is common among athletes and people who perform repetitive motions, causing pain and swelling in the affected joint.

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

While Freeman seemed to overcome the knee tendinitis that flared in September, with treatment and a little extra rest, Ohtani still didn’t look like himself entering the playoffs.

From Los Angeles Times ● Oct. 16, 2026

I have patellar tendinitis so a lot of it is work tending to that.

From The Wall Street Journal ● Aug. 10, 2026

Draper's initial comeback earlier this season was derailed by tendinitis in his knee and the three-time ATP Tour winner had not played for more than two months before his return at Eastbourne in June.

From BBC ● Jul. 27, 2026

Lula was also given an injection in his right wrist to treat tendinitis in his thumb.

From Barron's ● Apr. 24, 2026

So, in order to avoid tendinitis in my pinky, shoulder pain, back pain, and myriad other things, I have to pace myself.

From "Split the Sky" by Marie Arnold

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