変動（へんどう、hendou）
- fluctuation

The Japanese word 変動 変動 (へんどう, hendō) primarily means "change," "fluctuation," "variation," or "transition." It describes a shift or alteration in something, often over time or in response to external factors. It can refer to changes in quantity, quality, state, or condition. 変動 can be used in a variety of contexts, from economics and finance to weather and personal circumstances. It implies that something is not static but rather subject to movement or alteration.

⚫︎株価の変動 Translation: Stock price fluctuations ⚫︎天気の変動 Translation: Weather changes ⚫︎感情の変動 Translation: Emotional ups and downs

This word is a more formal and versatile word for "change" than some other words. It is appropriate in a variety of situations. Use 変動 in situations where you want to emphasize the process or result of the change itself, rather than the act of changing. It's suitable for both written and spoken Japanese. For example, it is common in news reports, business discussions, and scientific contexts.

⚫︎ 変動 is typically written with the kanji 変動. ⚫︎ The hiragana reading is へんどう. ⚫︎ There are no common variations in the okurigana. ⚫︎ It is not typically written in katakana, unless used for emphasis or in specific technical contexts.

⚫︎ 変化 (へんか, henka) - change, transformation ⚫︎ 変化 is a more general term for change. ⚫︎ 異動 (いどう, idō) - transfer, change of position. ⚫︎ 推移 (すいい, sui'i) - transition, change over time. ⚫︎ 変動 emphasizes the instability and changeability.

⚫︎ 安定 (あんてい, antei) - stability, steady state ⚫︎ 不変 (ふへん, fuhen) - immutability, permanence

為替レートは毎日変動します。 ・Translation: Exchange rates fluctuate daily. ・Explanation: This sentence illustrates the use of 変動 to describe the ongoing changes in currency exchange rates.

景気の変動を予測するのは難しい。 ・Translation: Predicting economic fluctuations is difficult. ・Explanation: This example shows 変動 used in an economic context to discuss the unpredictability of business conditions.

The word 変動 is a compound word formed from two kanji: 変 (hen), meaning "change" or "alter," and 動 (dō), meaning "movement" or "motion." Combined, they create a single word that encapsulates the idea of change and movement or alteration.