buckle
US /ˈbʌk.əl/
UK /ˈbʌk.əl/

1.
2.
ceder, dobrar
bend or crumple under pressure; collapse
:
•
The old bridge began to buckle under the weight of the heavy truck.
A velha ponte começou a ceder sob o peso do caminhão pesado.
•
His knees began to buckle from exhaustion.
Seus joelhos começaram a ceder de exaustão.