光熱費（こうねつひ、kounetsuhi）
- utility costs

The Japanese word 光熱費 (こうねつひ) refers to the "utility expenses" or "utility bills". It encompasses the cost of essential services used in a household or business, primarily those related to energy and water. This generally includes electricity, gas, and water bills. The cost of these things is considered together as one category.

⚫︎ 今月の光熱費は高かった。 Translation: The utility bills were high this month. ⚫︎ 光熱費を節約するために、電気をこまめに消しましょう。 Translation: Let's turn off the lights frequently to save on utility bills. ⚫︎ 引っ越しに伴い、光熱費の手続きが必要だ。 Translation: I need to handle the utility bill procedures due to the move.

You use 光熱費 in conversations when discussing household or business expenses related to utilities. It's common when budgeting, comparing costs, or discussing ways to save money on energy and water. You can also use it when talking about moving or setting up utility services. The word is used widely and is understandable by almost everyone. You can use 光熱費 in everyday situations.

光熱費 is typically written in kanji and hiragana. ・ Kanji: 光熱費 ・ Hiragana: こうねつひ There are no variations in the okurigana. The way it's written is quite standard.

There aren't many direct synonyms for 光熱費 as it is a specific term. However, you could use more general terms when speaking, depending on the context. ・ 公共料金 (こうきょうりょうきん) - Public utilities (this is a broader term that includes things like taxes, which are not included in 光熱費)

There aren't direct antonyms for 光熱費 as it represents a category of expenses. You could discuss decreasing expenses, or other unrelated expenses, but not opposites.

夏の光熱費はエアコンの使用量によって大きく変動します。 ・Translation: The summer utility bills fluctuate greatly depending on air conditioner usage. ・Explanation: This sentence explains that the cost of utility bills in summer changes depending on how much you use the air conditioner.

新しいアパートは、光熱費込みの家賃です。 ・Translation: The rent for the new apartment includes utility bills. ・Explanation: This example explains that utility expenses are included in rent, so you do not have to pay utility bills separately.

The word 光熱費 is a compound word formed from: ・光 (こう) - Light (which is used to represent electricity) ・熱 (ねつ) - Heat (which is used to represent gas) ・費 (ひ) - Expense/Fee So, it literally means "light and heat expenses," referring to the costs of electricity and gas, with water often included by convention.