unstable meaning

EN[ʌnˈsteɪbəl] [-eɪbəl]

    Definition of unstable in English Dictionary

  • AdjectiveCOMmore unstableSUPmost unstablePREun-SUF-able
    1. Having a strong tendency to change.
      1. 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.
    2. Fluctuating; not constant.
      1. Fickle.
        1. Unpredictable.
          1. (chemistry) Readily decomposable.
            1. (physics) Radioactive, especially with a short half-life.
            2. More Examples
              1. Used in the Middle of Sentence
                • 2008: Hypobromous acid is a weak, unstable acid with chemical formula HBrO. - Hypobromous acid
                • Flavins are reduced by NAD(P)H via electron transfer and then sequentially converted to hyroperoxyflavins, which are an unstable intermediate.
            • Part-of-Speech Hierarchy
              1. Adjectives
                • Morphemes
                  • Prefixes
                    • Words by prefix
                      • Words prefixed with un-
                Related Links:
                1. en unstabler
                2. en unstabled
                3. en unstablest
                4. en unstableness
                5. en unstablenesses
                Source: Wiktionary
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                Meaning of unstable for the defined word.

                Grammatically, this word "unstable" is an adjective. It's also a morpheme, more specifically, a prefixe.
                Difficultness: Level 4
                Easy     ➨     Difficult
                Definiteness: Level 5
                Definite    ➨     Versatile