buckle

verb
1
to fasten something or be fastened with a buckle
سگک زدن, بستن
2
to become bent, damaged or broken under a weight or force; to bend, damage or break something in this way
خم شدن, تاب برداشتن, خم کردن
The steel frames began to buckle under the strain.
(figurative)A weaker man would have buckled under the pressure.
The crash buckled the front of my car.
3
when your knees or legs buckle or when you buckle at the knees, your knees become weak and you start to fall
خم شدن, لرزش زانو, ضعیف شدن
noun
1
a piece of metal or plastic used for joining the ends of a belt or for fastening a part of a bag, shoe, etc.
سگک