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has stumped

  • present perfect
    of stump (3rd person singular).
    stump
    noun
    the lower end of a tree or plant left after the main part falls or is cut off; a standing tree trunk from which the upper part and branches have been removed.

Example Sentences

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The trading action in Phreesia has stumped many observers, serving as a reminder to the highly volatile world of small-cap technology.

From Barron's Dec. 22, 2025

Amniotic fluid embolism is an extremely rare but life-threatening complication that has stumped healthcare providers because there aren’t any preceding risk factors, making it impossible to prevent, according to the National Organization for Rare Disorders.

From Los Angeles Times Apr. 12, 2025

Every week, Rajesh PN Rao, a computer scientist, gets emails from people claiming they've cracked an ancient script that has stumped scholars for generations.

From BBC Jan. 16, 2025

The findings, detailed in the journal Science Advances, may answer a question that has stumped scientists for decades about some of the most dramatic known climate shifts in Earth's history.

From Science Daily Feb. 9, 2024

“She pays attention, and when she has the courage to ask questions, they’re deep, thoughtful questions. More than once, she has stumped me. Sent me scrambling back to my college textbooks.”

From "The Miscalculations of Lightning Girl" by Stacy McAnulty