廃棄

1. Origins, structure, and basic meaning

• Structure: 廃棄, read はいき, is a verbal noun for deliberately discarding or disposing of something.
• Basic usage: It is used for regulated disposal and for decisions about whether usable items should be discarded.

2. Common pitfalls and similar expressions

• Deliberate disposal
  • 材料を廃棄した describes disposal by decision and procedure, not accidental loss.
• Scope of the negative form
  • 廃棄しない方法 asks how to avoid disposal; it does not by itself require indefinite storage of the items.