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N-COUNT
（皮帶等的）搭扣，搭鉤
A buckle is a piece of metal or plastic attached to one end of a belt or strap, which is used to fasten it.
例句
He wore a belt with a large brass buckle.
他系了條帶有一個大的銅搭扣的皮帶。
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VERB
扣住；扣緊
When you buckle a belt or strap, you fasten it.
例句
A door slammed in the house and a man came out buckling his belt.
房子里的一扇門砰地關上，一個男子邊扣腰帶邊走了出來。
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V-ERG
（因受熱或受力）（使）彎曲，（使）變形
If an object buckles or if something buckles it, it becomes bent as a result of very great heat or force.
例句
The door was beginning to buckle from the intense heat...
門在高溫高熱下開始變形。
A freak wave had buckled the deck.
突然掀起的巨浪打彎了甲板。
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VERB
（雙腿或膝蓋因虛弱、勞累）發軟
If your legs or knees buckle, they bend because they have become very weak or tired.
例句
Mcanally's knees buckled and he crumpled down onto the floor...
麥卡納利雙膝發軟，癱倒在地板上。
His right leg buckled under him.
他的右腿發軟打戰。