充当

1. Origins, structure, and basic meaning

• Structure: 充当(じゅうとう) means applying money or other resources to a particular purpose.
• Basic usage: It is used in formal explanations of allocating sales revenue or remaining funds to repairs or operating costs.

2. Common pitfalls and similar expressions

• Resource and purpose
  • In 売上の一部を設備の修理費に充当する, を marks the funds used and に marks their purpose.
• Saving and allocating
  • 貯蓄(ちょちく) focuses on setting money aside; 充当 focuses on applying it to a specified use.