付加

1. Origins, structure, and basic meaning

• Structure: Written 付加 and read ふか, it means adding a new element to an existing amount, charge, or body of material.
• Basic usage: It applies to a fee added to a base price and explanatory text appended to images.

2. Common pitfalls and similar expressions

• Addition rather than replacement
  • The original remains while another component is attached or included.