Translation guide
The English word 'flux' covers several distinct ideas: continuous change, a state of flow, and technical meanings in physics and medicine. This guide helps learners choose the right Japanese expression for each meaning.
Describing a situation, state, or condition that is constantly changing and not settled.
The most common and natural way to say something is 'in flux' or 'fluid'. Used for situations, plans, or conditions that are unsettled and likely to change.
今後の予定はまだ流動的です。
Future plans are still in flux.
政治情勢が流動的で、何が起こるかわからない。
The political situation is in flux, and no one knows what will happen.
Means 'unstable' or 'precarious'. Emphasizes lack of stability rather than fluidity. Often used for economic or emotional states.
経済が不安定な状態にある。
The economy is in a state of flux.
Literally 'fluctuating'. Used when something is actively changing, like prices or numbers.
為替レートが常に変動している。
Exchange rates are constantly in flux.
Describing physical or metaphorical flow, continuous movement, or a state of being in motion.
The general word for 'flow' or 'stream'. Can be used for liquids, time, conversation, or abstract processes.
会話の流れが途切れた。
The flow of conversation was interrupted.
歴史の流れの中で、多くの変化が起きた。
Many changes occurred in the flux of history.
The loanword from English. Used mainly in technical contexts like physics or soldering, not for general 'change'.
Scientific term for the rate of transfer of energy, particles, or fluid across a surface.
The standard physics term for 'flux' as a flow rate per unit area. Used in contexts like heat flux, magnetic flux, etc.
熱流束を計算する。
Calculate the heat flux.
Also used in physics, often in compound terms like 'magnetic flux' (磁束).
磁束密度はテスラで測られる。
Magnetic flux density is measured in teslas.
An old term for dysentery or abnormal discharge from the bowels.
Specifically means dysentery (bloody flux). Rarely used in modern conversation; replaced by more specific medical terms.
昔は赤痢が流行した。
In the past, the flux (dysentery) was prevalent.
Do not use フラックス for general 'change' or 'instability'. It sounds unnatural and is limited to technical fields. Use 流動的 or 不安定 instead.
状況は流動的です。
The situation is in flux.
磁束は英語で magnetic flux と言います。
Magnetic flux is called 'magnetic flux' in English.