unstable

Part of speech: adjective

Lacking firmness; easily liable to change; wavering; inconstant; fickle.

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Usage examples "unstable":

  1. Carry, she thought very " nice," but she was too noisy and gushing for Lizzie, just so heavily bereaved; consequently the little maiden was forced to withdraw herself within herself, and think of the future and Tom, and build very unstable castles in the air. - "Caught in a Trap", John C. Hutcheson.
  2. A social order so established rests upon a very unstable foundation. - "Introduction to Non-Violence", Theodore Paullin.
  3. I know that Blenavon is uncertain and unstable to a degree. - "The Betrayal", E. Phillips Oppenheim.