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to buckle down
[phrase form: buckle]
01
to work hard in order to achieve a goal
02
to securely fasten something in place
buckle down
v
Example
The instructor reminded the students to buckle down their backpacks during the field trip.
The pilot instructed everyone to buckle down their seat belts before takeoff.
Make sure to buckle down your helmet before riding the bike.
The climber needed to buckle down his safety gear before ascending the mountain.
