Synonyms for

Unstable

Verb / ʌˈnsteɪbʌl / Another word for unstable — explore alternatives below. For syllable breakdowns and pronunciation, see this word on Syllablesworld.

Definition

Unstable means not firm or steady, likely to change or fail.

Synonyms & similar words

unsound stable mentallyill precarious fluid Unsteady Shaky Insecure Wobbly Fluctuating Fickle Erratic Changeable Unpredictable Variable Unreliable Unbalanced Unsettled Turbulent Volatile Capricious Mercurial Irresolute Indecisive Perilous

Synonyms by register

Formal

precarious insecure unreliable volatile

Informal

shaky wobbly iffy on the rocks

Literary

fickle capricious ephemeral

Antonyms

stable steady firm secure balanced constant solid

Common collocations

  • unstable economy
  • unstable situation
  • unstable platform
  • unstable mind
  • unstable weather
  • unstable government
  • unstable relationship

Word family

noun instability
adjective unstable
adverb unstably

Usage note

Often used to describe physical objects, abstract concepts like economies or relationships, or mental states. Can imply a lack of reliability or a tendency to change unpredictably.

Example sentences

  1. The ladder was unstable and wobbled as I climbed it.
  2. The economy is unstable and unpredictable right now.
  3. The chair was unstable and tipped over when I sat on it.
  4. The ground was unstable and caused the building to collapse.
  5. The stock market is unstable and constantly fluctuating.

Quotes

  • The only thing that is constant is change. - Heraclitus
  • The only way to make sense out of change is to plunge into it, move with it, and join the dance. - Alan Watts
  • The future belongs to those who can hear it coming. - David Bowie

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