buckle

US /ˈbʌk.əl/
UK /ˈbʌk.əl/
"buckle" picture
1.

a flat, typically rectangular, metal or plastic clasp or fastener, especially on a belt or strap

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He fastened the buckle of his belt.
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The shoe has a decorative buckle on the front.
:
claspfastenercatch
1.

fasten (a belt or strap) with a buckle

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Please buckle your seatbelt before we start driving.
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She carefully buckled the straps of her backpack.
:
fastenclaspsecure
2.

bend or crumple under pressure; collapse

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The old bridge began to buckle under the weight of the heavy truck.
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His knees began to buckle from exhaustion.
:
bendcrumplecollapsegive wayfold
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buckle downbuckle up