降水量（こうすいりょう、kousuiryoう）
- precipitation

The Japanese word 降水量 (こうすいりょう, *kōsuiryō*) refers to the amount of precipitation that falls in a specific area over a given period. It's a measure of rainfall, snowfall, sleet, hail, and any other form of water that comes down from the atmosphere. It is typically measured in millimeters (mm) or inches. The concept is central to understanding weather reports and climate analysis. It helps us understand how much water the land and environment are receiving. The value of 降水量 tells you about how wet it is.

⚫︎今日の降水量は10mmでした。 Translation: Today's precipitation was 10mm. ⚫︎ 大雨警報が発令され、降水量が非常に多くなることが予想されています。 Translation: A heavy rain warning has been issued, and a very high amount of precipitation is expected. ⚫︎ この地域は年間平均降水量が少ないため、乾燥しています。 Translation: This region is dry because the annual average precipitation is low.

You'll commonly encounter 降水量 in the following contexts: ⚫︎Weather forecasts: This is the most frequent use. ⚫︎Climate studies: For analyzing long-term patterns of rainfall. ⚫︎Hydrology and agriculture: In discussing water resources and the impact of rain on farming. ⚫︎News reports about heavy rain, floods, and droughts.

降水量 is primarily written using the following: ⚫︎ Kanji: 降水量 ⚫︎ Hiragana (reading aid): こうすいりょう ⚫︎ Katakana: This is very rarely used for this word. There are no variations in the *okurigana* (the hiragana suffix). The kanji is standard, and the pronunciation is fixed.

There aren't direct synonyms for 降水量 itself, as it's a specific technical term. However, related terms include: ⚫︎ 降雨量 (*kōūryō*): amount of rainfall (specifically). ⚫︎ 降雪量 (*kōsetsu ryō*): amount of snowfall. ⚫︎ 雨量 (*uryō*): amount of rain. These terms are more specific.

There aren't direct antonyms for 降水量, as the word represents a measurement. The closest concept to an antonym would be dryness or lack of rain, which would be described with different words: ⚫︎ 乾燥 (*kanso*): dryness ⚫︎ 旱魃 (*kanbatsu*): drought These indicate the absence or deficiency of precipitation, rather than being the direct opposite of a measurement.

今日の天気予報では、降水量が50mmを超えるとのことです。 ・Translation: The weather forecast for today says that the precipitation will exceed 50mm. ・Explanation: This sentence utilizes 降水量 to communicate the anticipated amount of rainfall.

この地域の年間平均降水量は、1000mmです。 ・Translation: The annual average precipitation in this area is 1000mm. ・Explanation: This sentence conveys a general measurement related to the climate.

The word 降水量 is made up of: ⚫︎ 降 (kō): meaning "to fall" or "to descend" (referring to precipitation). ⚫︎ 水 (sui): meaning "water." ⚫︎ 量 (ryō): meaning "amount" or "quantity." Thus, 降水量 literally means "the amount of falling water," reflecting its meaning.