Buckle down

"Buckle down" in a Sentence (2 examples)

If he would buckle down and do his homework, he could be an excellent student.

I confess that the recollection of what this bell could do when it buckled down to it gave me pause as I stood that night at 12.30 p.m. prompt beside the outhouse where it was located.

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Unscramble this word: buckledown