Translation guide
The English word "variable" can refer to something that changes, a factor in a situation, or a mathematical symbol. This guide covers how to express these meanings naturally in Japanese.
Describing something that can vary or is subject to change, such as weather, mood, or conditions.
Referring to one of several factors that affect a situation or outcome.
A symbol representing a value that can change, used in math, science, or computing.
要因 (よういん) is best for causal factors in real-world situations. 変数 (へんすう) is primarily mathematical but can be used metaphorically. 要素 (ようそ) is a general 'element' and is less specific about changeability.
Common adjective meaning 'easily changeable' or 'prone to change'. Used for weather, moods, etc.
春の天気は変わりやすい。
Spring weather is variable.
Verb meaning 'to fluctuate' or 'to vary', often used for numerical values, prices, or conditions.
株価は常に変動している。
Stock prices are constantly variable.
Phrase meaning 'not constant' or 'unstable'. Used for things that lack consistency.
彼の成績は一定しない。
His grades are variable.
Common noun meaning 'factor' or 'cause'. Used in analysis or discussion of contributing elements.
成功には多くの要因が関わっている。
Many variables are involved in success.
Literally 'variable' in a mathematical or programming sense, but can be used metaphorically for a factor that changes.
この問題には未知の変数が多すぎる。
There are too many unknown variables in this problem.
General word for 'element' or 'component'. Often used in contexts like 'key variable'.
計画の重要な要素を見落としていた。
I overlooked an important variable in the plan.
The standard term for a mathematical or programming variable.
この方程式ではxとyが変数です。
In this equation, x and y are variables.