difficult problem

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.

Still, Iran’s drones are proving to be a difficult problem External link for the American military to solve.

From Barron's • Mar. 9, 2026

“It’s a difficult problem to solve, and California is kind of solving it in real time.”

From Los Angeles Times • Nov. 26, 2025

If scientists could find a way to create specific mutations to break the protein interaction, it could be a lead on a future vaccine — but it is a difficult problem to solve, Shah said.

From Salon • Feb. 3, 2025

This difficult problem has again been studied by many groups in many different ways, but now a similar unifying structure might be just around the corner.

From Science Daily • Apr. 26, 2024

It was a difficult problem, as they did not know how many girls were in existence.

From "The Interrupted Tale" by Maryrose Wood