淘汰

1. Origins, structure, and basic meaning

• Structure: The written form is 淘汰, read とうた. Elements of selection and removal combine to denote a process in which some traits or products remain and others disappear.
• Basic usage: 自然淘汰によって describes traits remaining through a natural process, while 市場から淘汰される describes undistinguished products being removed from a market.

2. Common pitfalls and similar expressions

• Natural-selection context
  • It is used for the biological selection process by which environment-suited traits remain. Example: 環境に適した性質が自然淘汰によって残った。 — Traits suited to the environment survived through natural selection.
• Removal through competition
  • In a market context, it is a strong expression for products without distinctive features being eliminated by competition. Example: 似た商品が増え、特徴のない品は市場から淘汰された。 — As similar products multiplied, those without distinctive features were eliminated from the market.