Substantial challenge

Definitions

A significant or difficult task that requires considerable effort, resources, or skill to overcome.

A problem of notable size, importance, or complexity that poses a serious obstacle.

Examples

Transitioning to a fully renewable energy grid presents a substantial challenge for developing nations.

The team realized that meeting the project deadline would be a substantial challenge given the limited resources available.

Synonyms

Formidable obstacle Significant hurdle Daunting task Major difficulty Arduous undertaking

Antonyms

Trivial matter Simple task Easy accomplishment Minor inconvenience Effortless endeavor