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- pronunciation:
- uhn
steI
b
 l
- features:
- Word Explorer, Word Parts
| part of speech: |
adjective |
| definition 1: |
likely to change suddenly.
Jane is still in the hospital because her condition is unstable.- antonyms:
- stable
- similar words:
- shifting, unsettled
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| definition 2: |
not steady; not securely fixed.
The unstable chair collapsed when I sat on it.- synonyms:
- rickety, shaky, unsteady
- antonyms:
- stable, steady
- similar words:
- dilapidated, flimsy, insecure
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| related words: |
dizzy, explosive, irresponsible, moody, nervous, shaky, variable, weak |
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| derivations: |
unstably (adv.), unstableness (n.) |
The word unstable
contains the following part:
un-1
Old English
prefix
that means not
  More about this word part:
The prefix un1 attaches to adjectives to create adjectives that mean the opposite of the base word.
Example words:
unable, unaware, unbeaten, unbelievable, uncertain, unclear, uncomfortable, uncommon, unconscious, unconstitutional, uncooperative, undecided, undue, unemployed, uneasy, unequal, uneven, unfair, unfamiliar, unfortunate, unfriendly, unhappy, unhealthy, unimportant, uninhabited, uninterested, unkind, unknown, unlawful, unlike, unlimited, unlucky, unnatural, unnecessary, unpleasant, unpopular, unreliable, unreasonable, unsatisfactory, unstable, unsteady, untrue, unusual, unwell
- synonyms:
- dis-, de-, in-2
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