Sentences with Knuckle

The student had to knuckle down and focus on studying for the upcoming exam.

Timmy had to knuckle down and finish his homework before going out to play.

The young gymnast had to knuckle down and practice tirelessly to perfect her routine for the upcoming competition.

To succeed in the project, the team needed to knuckle down and focus.

The tree began to knuckle under the force of the strong winds.