Word.ws English Dictionary

unstablest

unstablest is the superlative form of unstable.

Meaning of unstable

Adjective

unstable (comparative more unstable, superlative most unstable)

  1. Not stable.
    • unstable foundation
  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...2013 August 3, “Yesterday’s fuel”, in The Economist, volume 408, number 8847
    Synonyms:
    labile
  3. Fluctuating; not constant.
    • politically unstable
    Synonyms:
    instable
  4. (figuratively) Fickle.
  5. (figuratively) Unpredictable.
    • All of the characters in Rocko's Modern Life are anthropomorphic animals of varying species, the vast majority of whom are mentally unstable. Murray said that he matched personalities of his characters to the various animals in the series to form a social caricature.2024 May 29, Brie Hoffler, “Chaos Ride: Episode 2 APK”, in tialalnafi (Usenet)
  6. Readily decomposable.
    • chemically unstable

See all 8 meanings of unstable

Questions about unstablest

What is unstablest the superlative form of?
Unstablest is the superlative form of unstable.

Words near unstablest in the dictionary

  1. unstabled
  2. unstableness
  3. unstablenesses
  4. unstabler
  5. unstables
  6. unstablest
  7. unstabling
  8. unstably
  9. unstack
  10. unstackable
  11. unstacked

Source and license

Adapted from Wiktionary: unstablest (page history and authors); unstable (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “unstablest.” Word.ws, https://word.ws/unstablest. Based on Wiktionary, CC BY-SA 4.0.