冷却（れいきゃく、reikyaku）
- cooling

The Japanese word 冷却 (れいきゃく, reikyaku) primarily means "cooling," "cooling down," or "refrigeration." It refers to the process of reducing the temperature of something or allowing it to cool. This can apply to various contexts, from the physical cooling of objects and machines to the more figurative cooling of emotions or situations. 冷却 involves the removal of heat, and the resulting state can be referred to as "cooled" or "chilled". The term encompasses both active cooling processes and passive cooling that occurs naturally.

⚫︎ エンジンを冷却する Translation: Cool the engine. ⚫︎ 飲み物を冷蔵庫で冷却する Translation: Cool the drinks in the refrigerator. ⚫︎ 興奮した気持ちを冷却する Translation: Cool down excited feelings.

冷却 is used in various situations where temperature reduction is involved. ⚫︎ You can use it when talking about physical processes such as cooling a machine, a liquid, or a room. ⚫︎ It's also suitable when describing actions or processes related to reducing heat, or chilling things. ⚫︎ It is also used metaphorically to describe the calming down of emotions, like anger or excitement. You will hear 冷却 in the context of: science and engineering, cooking and food preservation, and even in daily conversation.

⚫︎ The word is typically written in kanji as 冷却. ⚫︎ The reading is れいきゃく in hiragana. ⚫︎ The kanji 冷 (rei) means "cool" or "cold," and 却 (kyaku) means "to reject" or "to remove." When combined, they signify the removal of heat. ⚫︎ The okurigana is standard, with no variations.

⚫︎ 冷やす (hiyasu): to cool down, to chill. ⚫︎ 冷ます (samasu): to cool down (as in food or a heated object). ⚫︎ 冷却する (冷却suru): to cool down, to refrigerate (using the same verb form as the word).

⚫︎ 加熱 (k加热aku): heating. ⚫︎ 暖める (atatamaru): to warm up. ⚫︎ 温める (atameru): to warm up.

この機械は冷却システムが故障したため、すぐに停止しました。 ・Translation: This machine stopped immediately because the cooling system broke down. ・Explanation: This sentence uses 冷却 to describe the failure of a cooling system, impacting the machine's functionality.

彼は怒りが収まらず、しばらく時間を置いて自分の感情を冷却する必要があった。 ・Translation: He couldn't calm down his anger, and needed some time to cool down his emotions. ・Explanation: Here, 冷却 is used figuratively to mean calming down or cooling off emotions, demonstrating its wider application.

The word 冷却 is formed by combining the kanji 冷 (rei), which means "cold" or "cool," and 却 (kyaku), which means "to reject" or "to remove." Together, the kanji implies the concept of removing heat, resulting in a cooling effect or a cooled state. The etymological roots directly reflect the word's meaning of lowering the temperature.