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不安定な
fuantei na
unstable
この橋は不安定なので、通行禁止です。
This bridge is unstable, so it's closed to traffic.
general
Lacking stability or balance; prone to change or collapse.
経済が不安定な時期は投資にリスクが伴います。
During unstable economic times, investments carry risks.
彼の性格は不安定で、気分が変わりやすい。
His personality is unstable, and his moods change easily.
Often used to describe physical structures, systems, or emotional states that are unreliable or prone to sudden changes.
Related Phrases
Pro Tip
Context Matters
This word can describe physical objects (e.g., unstable structures) or abstract concepts (e.g., unstable emotions).
Gold Rule
Avoid Overuse
While useful, overusing this word can make your speech sound overly negative or dramatic.
Word Origin
Composed of 不安 (fuan, 'anxiety') and 定 (tei, 'stability'), literally meaning 'lacking stability' or 'prone to anxiety'.
Usage Notes
Commonly used in both physical and abstract contexts to describe things that are unreliable or prone to sudden changes.
Word Breakdown
不安
anxiety, instability
root定
stability, certainty
rootな
adjectival suffix
suffix和英辞典