chiefhurdle

noun
UK /tʃiːf ˈhɜːdl/
US /tʃiːf ˈhɜːrdl/

The biggest problem that makes it hard to finish something.

The chief hurdle to our treehouse plan was finding enough wood.


OTHER MEANINGS

2. The most important fence a horse must jump in a race.

The chief hurdle stood tall at the end of the track.

3. The main thing that slows down a team's progress.

Lack of sleep was the chief hurdle for the players.

4. The hardest part of a test or task.

The chief hurdle of the puzzle was the last clue.