崩す
くずす · kuzusu · JLPT N2 · verb-godan
to destroy
🧱💴 崩 = crumble. 崩す = crumble something: destroy it, or break a bill into change
崩 means crumble or collapse, and the verb 崩す makes something crumble. For money, you crumble a large note into smaller coins, so the change is the broken-down pieces.