challenge

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.

“Forecasting and prediction is still a very challenging and unreliable domain for AI,” he said.

From The Wall Street Journal

In most cases, however, doctors cannot pinpoint a clear structural cause, which makes effective long-term treatment challenging.

From Science Daily

However, their extreme thinness also creates a challenge.

From Science Daily

Obtaining basic identity documents was already challenging under the current system.

From Barron's

Fans in Manchester were encouraged to recognise abuse and challenge it.

From BBC