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- pronunciation:
- uhn
steI
b
 l
- features:
- Word Combinations (adjective), Word Explorer, Word Parts
| part of speech: |
adjective |
| definition 1: |
likely to change suddenly; fluctuating.
an unstable economy- synonyms:
- fluctuating, unsteady, up-and-down, volatile
- antonyms:
- stable
- similar words:
- changeable, fickle, fluid, inconstant, labile, mutable, precarious, shifting, temperamental, unsettled
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| definition 2: |
not steady; not securely fixed.
a rickety, unstable chair- synonyms:
- rickety, shaky, unsteady
- antonyms:
- stable, steady
- similar words:
- decrepit, dilapidated, flimsy, insecure, precarious, tippy, unsound, wobbly
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| definition 3: |
emotionally or mentally unsound.
an unstable personality- synonyms:
- unbalanced, unsound
- antonyms:
- stable
- similar words:
- crazy, demented, deranged, erratic, insane, neurotic, nutty, unstrung
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| definition 4: |
of chemical compounds, readily decomposing or reacting.
- synonyms:
- labile
- antonyms:
- stable
- similar words:
- fluid, reactive, volatile
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| definition 5: |
in physics, likely to change in state or composition.
- antonyms:
- stable
- similar words:
- fluid, labile, reactive, unsteady, volatile
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| related words: |
capricious, dizzy, explosive, flighty, inconsistent, infirm, irresponsible, mercurial, moody, nervous, perishable, ramshackle, shaky, trick, tumble-down, turbulent, variable, wayward, weak |
adverb + (adj.)unstable
bit,
chronically,
dangerously,
desperately,
dynamically,
economically,
emotionally,
essentially,
extremely,
financially,
fundamentally,
geologically,
gravitationally,
hence,
highly,
historically,
increasingly,
inherently,
medically,
mentally,
naturally,
notoriously,
permanently,
politically,
potentially,
psychologically,
radically,
relatively,
remarkably,
somewhat,
sufficiently
[See all][See only the most frequent]
(adj.)unstable
+ adverb
rapidly
(adj.)unstable
+ noun
airplane,
angina,
atmosphere,
atom,
attribution,
boundary,
climate,
collapse,
compost,
compound,
condition,
currency,
economy,
electron,
element,
environment,
equilibrium,
fracture,
franchise,
ground,
havoc,
hillside,
housing,
identity,
isotope,
mixture,
molecule,
nature,
nucleus,
orbit,
oxygen,
particle,
pattern,
periphery,
platform,
regime,
region,
relationship,
segment,
situation,
slope,
soil,
spine,
terrain,
tunnel
[See all][See only the most frequent]
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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, unarmed, unaware, unbeaten, unbelievable, uncertain, uncivil, unclear, uncomfortable, uncommon, unconscious, unconstitutional, uncooperative, undecided, undue, unemployed, uneasy, unequal, uneven, unequivocal, unexceptionable, unexceptional, unfair, unfamiliar, unfinished, unfortunate, unfriendly, unhappy, unhealthy, unimportant, uninhabited, uninterested, unkempt, unkind, unknown, unlawful, unlike, unlimited, unlucky, unnatural, unnecessary, unorthodox, unpleasant, unpopular, unreliable, unreasonable, unsafe, unsatisfactory, unstable, unsteady, untidy, untrue, unusual, unwell
- synonyms:
- dis-, de-, in-2
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