Note
Bozmak has a wider range of meanings than kırmak. It's often used when referring to breaking a rule, a promise, or causing a machine to stop working.
Usages of bozmak
Pantolonumun bozduğum fermuarı
[Lit.] The zipper, which I broke, of my pants
Kuralı bozdum.
I broke the rule.
Sözü bozdu.
She broke the promise.
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