投棄

1. Origins, structure, and basic meaning

• Structure: 投棄, read とうき, means dumping or discarding waste and similar things.
• Basic usage: It is used for dumping trash along a mountain road or suspected dumping of waste oil in a river.
  • 山道へのごみの投棄は固く禁じられている。

2. Common pitfalls and similar expressions

• The homophone 投機
  • 投棄 means dumping, while the identically pronounced 投機 means trading to profit from price changes.