石炭（せきたん、sekitan）
- coal

The Japanese word 石炭 (せきたん, sekita n) refers to "coal." ⚫︎ Coal is a combustible black or brownish-black sedimentary rock composed primarily of carbon and hydrocarbons. ⚫︎ It is a fossil fuel that is used as a source of energy. ⚫︎ 石炭 is used to generate electricity, as a fuel for heating, and in industrial processes.

⚫︎ 石炭火力発電所 Translation: Coal-fired power plant ⚫︎ 石炭を燃やす Translation: To burn coal ⚫︎ 石炭産業 Translation: Coal industry

⚫︎ You would use 石炭 when discussing coal, its uses, or its presence in a specific context. ⚫︎ For instance, you could use it in discussions about energy resources, environmental concerns related to coal use, or the history of coal mining. ⚫︎ It's a relatively formal word, appropriate for discussions about industry, science, or economics.

⚫︎ The word 石炭 is primarily written using kanji and read as せきたん (sekita n) in hiragana. ⚫︎ There are no other common ways to write this word, such as using katakana. ⚫︎ The okurigana (hiragana following the kanji) is not applicable.

There are no direct synonyms in common usage. The meaning is very specific.

⚫︎ There is no direct antonym for 石炭. ⚫︎ However, words related to alternative energy sources or other types of fuel could be considered antonymous in a broader sense, such as: 石油 (sekiyu, petroleum), 天然ガス (tennen gasu, natural gas), 太陽光 (taiyo ko, sunlight).

日本は、多くの石炭を輸入しています。 ・Translation: Japan imports a lot of coal. ・Explanation: This sentence describes the import of coal, making it a clear example of the word's usage.

石炭は、火力発電の主要な燃料です。 ・Translation: Coal is a major fuel for thermal power generation. ・Explanation: This sentence explains the use of coal in power generation.

⚫︎ 石炭 is a compound word formed from two kanji. ⚫︎ 石 (ishi) means "stone," and 炭 (sumi) means "charcoal" or "coal." ⚫︎ Therefore, 石炭 literally translates to "stone coal," describing the nature of coal as a stone-like substance that burns like charcoal.