Translation guide
The state of being likely to change, fail, or become unbalanced. Covers physical, emotional, political, and technical contexts.
Describing unstable governments, societies, or situations.
The most common and general term for instability in political, economic, or social contexts.
その国は政治的に不安定だ。
That country is politically unstable.
Noun form emphasizing the degree or quality of instability.
政情の不安定さが問題だ。
The instability of the political situation is a problem.
Refers to unrest, agitation, or turmoil, often in a social or political context. More emotional than structural.
社会の動揺が続いている。
Social unrest continues.
Describing a person's unstable mood or mental state.
Used for emotional or mental instability, often in clinical or everyday contexts.
彼は情緒が不安定だ。
He is emotionally unstable.
Noun form for the quality of emotional instability.
彼女の精神的な不安定さが心配だ。
I'm worried about her mental instability.
Literally 'easiness of mood change', used for mood swings or emotional lability.
最近、気分の変わりやすさがひどい。
Lately, my mood swings are terrible.
Describing objects, structures, or systems that are physically unsteady or prone to collapse.
General term for physical instability, such as an unstable ladder or shaky table.
この机は不安定だ。
This desk is unstable.
Refers to wobbliness or shakiness, often for furniture or structures.
椅子のぐらつきを直して。
Fix the wobbliness of the chair.
Technical term for instability, used in engineering or science.
この構造の不安定性が問題だ。
The instability of this structure is a problem.
Describing unstable economic conditions, markets, or prices.
Commonly used for financial instability, such as volatile markets.
市場が不安定だ。
The market is unstable.
More formal or technical term for financial instability.
金融システムの不安定性が高まっている。
The instability of the financial system is increasing.
Refers to fluctuation or volatility, often used for prices or exchange rates.
不安定 is the most common adjective/noun. 不安定性 is a technical noun often used in science and engineering. 不安定さ emphasizes the degree or quality of instability and is more colloquial.
この橋は不安定だ。
This bridge is unstable.
橋の不安定性を調査する。
Investigate the instability of the bridge.
橋の不安定さが気になる。
I'm concerned about the instability of the bridge.
為替の変動が激しい。
Exchange rate fluctuations are severe.