English Dictionary

unstable

IPA（発音記号）

/ʌnˈsteɪbəɫ/

形容詞

Not stable. / Having a strong tendency to change. / Fluctuating; not constant. / Fickle. / Unpredictable. / (chemistry) Readily decomposable. / (physics) Radioactive, especially with a short half-life.

日本語の意味

安定していない / 変化しやすい、揺れ動く / 一定でない、変動する / 気まぐれな、予測できない / （化学）容易に分解される / （物理）放射性であり、特に半減期が短い

The ladder felt unstable, so she refused to climb it.

そのはしごは不安定だったので、彼女は登るのを拒んだ。

意味（1）

Not stable.

The hillside at this point is composed of shaly rock overlaid with a peaty loam which carries a growth of heather, and its unstable condition has resulted in two landslides in the course of the railway's history.

意味（2）

Having a strong tendency to change.

The dawn of the oil age was fairly recent. Although the stuff was used to waterproof boats in the Middle East 6,000 years ago, extracting it in earnest began only in 1859 after an oil strike in Pennsylvania.[…]It was used to make kerosene, the main fuel for artificial lighting after overfishing led to a shortage of whale blubber. Other liquids produced in the refining process, too unstable or smoky for lamplight, were burned or dumped.

意味（3）

Fluctuating; not constant.

意味（4）

Fickle.

意味（5）

Unpredictable.

意味（6）

(chemistry) Readily decomposable.

意味（7）

(physics) Radioactive, especially with a short half-life.

more unstable （ comparative ）

most unstable （ superlative ）