成分（せいぶん、seibun）
- ingredient

The Japanese word 成分 (せいぶん, seibun) primarily refers to the "ingredients," "components," or "constituents" of something. It describes the substances that make up a mixture, compound, or any other type of item. It can be used for both tangible and abstract things. 成分 indicates what a thing is made of. ⚫︎ It is often used in the context of food, cosmetics, chemicals, or any product where a list of ingredients is provided. ⚫︎ It can also refer to the components of a concept, idea, or system. ⚫︎ The focus is on the individual parts or elements that form a whole. ⚫︎ The word emphasizes a breakdown or analysis of what makes something, what it is.

⚫︎この化粧品の成分は何ですか？ Translation: What are the ingredients of this cosmetic? ⚫︎食品の成分表示を見てください。 Translation: Please look at the ingredient list of the food. ⚫︎その議論の重要な成分は、経済的な視点です。 Translation: An important component of that discussion is the economic perspective.

You use 成分 when you want to talk about what something is composed of. ⚫︎ It’s useful in situations where you analyze or describe the parts that make up a whole. ⚫︎ It's common to use 成分 when reading labels, scientific reports, or discussing the elements of a debate or argument. ⚫︎ In everyday conversation, it is often employed when buying products, discussing recipes, or examining the structure of a given topic.

The word is written as 成分. ⚫︎ The kanji 成 (sei) means "to become" or "to form". ⚫︎ The kanji 分 (bun) means "part," "portion," or "ingredient." ⚫︎ It is usually written in kanji, but you might also see it written in hiragana as せいぶん, especially for learners. ⚫︎ There are no variations in the okurigana for this word.

⚫︎ 材料 (ざいりょう, zairyō) - "material," "ingredient" (usually for food or construction) ⚫︎ 要素 (ようそ, yōso) - "element," "component" (more general and abstract) ⚫︎ 内容 (ないよう, naiyō) - "content" (used when referring to the contents of a book, a speech, etc.) ⚫︎ 構成要素 (こうせいようそ, kōseiyōso) - "component", "constituent"

There aren’t direct antonyms of 成分, as it is a term that describes what something is composed of. ⚫︎ It's more about describing the absence or lack of the 成分, but there is not a single word to be the antonym itself.

この薬の成分は全て天然由来です。 ・Translation: All the ingredients of this medicine are naturally derived. ・Explanation: This sentence uses 成分 to explain what the medicine is made of. It emphasizes the source of the ingredients.

分析の成分を詳しく見てみましょう。 ・Translation: Let's take a closer look at the components of the analysis. ・Explanation: This example applies 成分 to an abstract concept ("analysis") to clarify the individual elements that make up the analysis.

The word 成分 is formed from the combination of the kanji 成 (sei), meaning "to become" or "to form," and 分 (bun), meaning "part," "portion," or "ingredient." Therefore, its etymology comes from the idea of "forming parts" or "the things that make something what it is".