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单词 unstable
释义
unstableun‧sta‧ble /ʌnˈsteɪbəl/ ●○○ AWL adjective Examples
EXAMPLES FROM OTHER DICTIONARIES
  • an unstable economy
  • He is emotionally unstable, and his aggressive attitude often culminates in violence.
  • Regimes governed by violence are always unstable.
  • That scaffolding looks unstable - get all the building workers off the site immediately.
  • Was it safe to trust someone who was so emotionally unstable?
  • Working with Clare every day, I began to realize how unstable she was.
EXAMPLES FROM THE CORPUS
  • Handy rejects a full-blown version of this vision on the grounds that such a divergent society would be very unstable.
  • It was potentially extremely dangerous and although it had survived since the war it may have been very unstable.
  • Mentally unstable, he would kill his parents in an explosive night of violence.
  • The isotope U-235 is unstable, decaying by a process called spontaneous fission.
  • The situation here is precarious, quite unstable.
  • The situation there remains very unstable.
  • The woman, who was described as mentally unstable, refused to talk about her reasons for the shooting.
  • This moves their orbital electrons from the ground state to a higher energy level that is unstable.
Thesaurus
THESAURUS
having an illness that affects your mind and your behaviour: · Many mentally ill people are treated in the community.· He was declared mentally ill and unfit to stand trial.
informal mentally ill: · I couldn’t think straight. I felt like I was going crazy (=becoming crazy).
old-fashioned mentally ill. This word is now usually considered offensive, and is usually used in a different meaning, when you think that someone’s ideas are not sensible: · Swift himself went mad (=became mad) later in life.· a mad old woman
[not before noun] old-fashioned having a serious and permanent mental illness: · She went insane after her two young sons were murdered.· a hospital for the criminally insane
not behaving in a normal way because of mental or emotional problems, especially problems that are caused by bad experiences: · She teaches emotionally disturbed children.· Her experiences left her deeply disturbed.
having an emotional state that often changes very suddenly: · Her mother was mentally unstable.· He lived in a small Putney flat with his ageing Aunt Bunny, and his emotionally unstable sister, Nancy.· He was too unstable to be a leader.
behaving in a crazy or dangerous way, usually because of being mentally ill: · A deranged young woman entered the school and took the life of one young boy.
having a serious and permanent mental illness that causes violent or criminal behaviour: · The film is about a psychopathic killer.
suffering from or caused by a serious mental illness that changes your character and makes you unable to behave in a normal way: · psychiatric services for chronic psychotic patients.· There is a tendency for psychotic illnesses to be inherited.
relating to or suffering from a mental illness that makes you unreasonably worried of frightened: · His mother was neurotic and insecure.· She’s neurotic about her weight.· A bored or lonely horse may become so neurotic that it chases itself around in circles.
Longman Language Activatorunsteady and likely to fall
someone who is unsteady is unable to balance properly, for example because of illness, old age or too much alcohol: · For a few moments he was pale and unsteady but his colour gradually returned.· He walked with the unsteady gait of an old man.unsteady on your feet: · She'll be a little unsteady on her feet until the anaesthetic wears off.
something that is unstable is unsteady because it is too big for the thing supporting it or not properly fastened to something, so that it is dangerous: · That scaffolding looks unstable - get all the building workers off the site immediately.
not safe and likely to fall down - use this especially about things or people that are in high places: · The bottle was in a precarious position on the edge of the table.· Are you sure he's safe on that ladder? It looks very precarious up there.
often changing or likely to change
feelings or conditions that are changeable change frequently so that it is difficult to know what they will be like in a short time: · You love him now, but at your age feelings are changeable.· I'm a changeable sort of person.· changeable weather
behaviour, processes, or services that are erratic change suddenly in an unexpected and surprising way, when it would be better if they remained the same: · Her behaviour was becoming more and more erratic.· Heating was difficult owing to erratic supplies of gas, electricity and water.· The company's erratic performance is a cause for some concern.
a volatile situation or character is likely to change suddenly and unexpectedly: · The political situation in the Balkans is still extremely volatile.· She formed enduring friendships with women and more intense, volatile ones with men.
a person, situation, or system or government that is unstable is likely to change suddenly and become worse, because there is something wrong with their character or the way things are organized: · Regimes governed by violence are always unstable.· Was it safe to trust someone who was so emotionally unstable?
changing according to the situation - use this about amounts, prices, speeds, temperatures etc: · Demand for the company's products is variable.· The weather here is likely to be very variable.
inconsistent behaviour or work changes too often from good to bad, and you cannot trust it to be good all the time: · People feel threatened when decision-making is inconsistent and arbitrary.· A succession of injuries produced an inconsistent season for one of our best players.
conditions or situations that are unsettled change frequently so that it is impossible to make plans or know what will happen: · It is dangerous to visit there while the political situation is so unsettled.· The weather has been very unsettled lately.· Eliot led a strangely unsettled life, drifting from place to place and job to job.
mentally ill
someone who is mentally ill has an illness of the mind which affects the way that they behave: · Many of these homeless people have been mentally ill at some time.the mentally ill (=people who are mentally ill): · He works in a hostel for the mentally ill.
connected with mental illness or people who are mentally ill: mental hospital/patient/institution: · a hospital ward for non-violent mental patientsmental problem/disorder/breakdown: · We knew she had been having mental problems.
formal permanently and seriously mentally ill, so that you cannot have a normal life - use this in legal contexts or in descriptions of people who lived in the past: · The man, who has attacked 13 women, was judged to be insane.go insane (=become seriously mentally ill): · Sometimes I thought I was going insane.
British crazy especially American mentally ill - use this in conversations or stories, but not in formal, medical, or legal English: · We soon realized that the old man was completely mad.· There's this crazy woman in our town who eats glass.go mad/crazy: · They say she went mad after her family were killed in a fire.
if someone is unstable , their emotional state often changes very suddenly, and they are likely to become angry, violent etc: · Working with Clare every day, I began to realize how unstable she was.emotionally/mentally unstable: · He is emotionally unstable, and his aggressive attitude often culminates in violence.
an old person who is confused has become mentally ill so that they cannot remember things or think clearly: · Aunt Clara had been so sharp, so witty, but now she is just a sad, confused old woman.
WORD SETS
acetate, nounacid, nounacidic, adjectiveacidify, verbactive, adjectiveadditive, nounagent, nounalchemy, nounalcohol, nounalkali, nounalkaline, adjectiveamalgam, nounantioxidant, noun-ate, suffixatomic number, nounbase, nounbauxite, nounbeaker, nounbenzene, nounbiochemistry, nounbitumen, nounbleach, nounbond, nounbonding, nouncalcify, verbcarbohydrate, nouncarbonate, nouncarbon dioxide, nouncarbonize, verbcatalyst, nouncaustic, adjectivechain reaction, nounchemical, nounchemical, adjectivechemical reaction, nounchemist, nounchemistry, nounchlorinate, verbcitric acid, nouncombustion, nounconcentration, nouncondense, verbcontaminant, nouncontaminate, verbcontaminated, adjectivecorrode, verbcorrosion, nouncorrosive, adjectivecrucible, nouncrystal, nouncrystallize, verbcyanide, nounDDT, noundecay, verbdecay, noundecompose, verbdegrade, verbderive, verbdetoxification, noundextrose, noundioxin, noundispersion, noundissolve, verbdistill, verbeffervesce, verbeffervescent, adjectiveelectrolysis, nounelectrolyte, nounelectroplate, verbemulsify, verbemulsion, nounenzyme, nounexpand, verbfatty acid, nounferment, verbferment, nounflashback, nounflask, nounformaldehyde, nounformula, nounfructose, nounfungicide, nounfuse, verbgas, noungaseous, adjectiveglucose, noungranular, adjectivegraphite, nounhallucinogen, nounhelium, nounherbicide, nounhydrate, nouninert, adjectiveinsoluble, adjectiveinsulin, nounion, nounionize, verblactic acid, nounlimescale, nounlitmus, nounlitmus paper, nounlitmus test, nounmethane, nounmixture, nounmolecule, nounneon, nounnerve gas, nounneutralize, verbneutron, nounnitric acid, nounnucleic acid, nounnucleus, nounnutrient, nounorganic chemistry, nounosmosis, nounoxidize, verboxyacetylene, nounoxygenate, verbozone, nounpart, nounpectin, nounpesticide, nounpestle, nounpetrochemical, nounpH, nounphotosynthesis, nounplasma, nounpolyunsaturated, adjectivepotash, nounprecipitate, verbprecipitate, nounprecipitation, nounproduct, nounprussic acid, nounquicklime, nounradioactive, adjectiveradioactivity, nounradiology, nounreact, verbreaction, nounreactive, adjectivereagent, nounresidue, nounretort, nounriboflavin, nounsalt, nounsaltpetre, nounsaturate, verbsaturated, adjectivesaturation, nounsaturation point, nounsemiconductor, nounsoft, adjectivesolid, nounsolution, nounsolvent, nounstability, nounstabilizer, nounstable, adjectivestarch, nounsteam, nounsucrose, nounsulphate, nounsulphide, nounsulphur, nounsulphur dioxide, nounsulphuric acid, nounsulphurous, adjectivesurface tension, nounsuspension, nounsynthesize, verbsynthetic, adjectivetannin, nountartaric acid, nounTNT, noununstable, adjectivevalence, nounvitamin, nounvolatile, adjectivevulcanize, verbwater softener, nounwater-soluble, adjectivewater vapour, nounwetting agent, noun
Collocations
COLLOCATIONS FROM THE CORPUSADVERB
· So you see, beneath that calm exterior lies a highly unstable child.· Because of its highly unstable nature, various thromboxane A 2 -generating systems have to be used in order to study its vasoactive properties.
· But Gore was a sick man. Mentally unstable, he would kill his parents in an explosive night of violence.· They may be able to help the unbalanced and mentally unstable to become somewhat more balanced and stable, we admit.· The conventional accounts of violence against women suggest that most men who are violent to women are mentally unstable in some way.· The woman, who was described as mentally unstable, refused to talk about her reasons for the shooting.· She hadn't known, until after she was married to Paul, that he had a brother who was mentally unstable.· Simpson said the lawyers accused her of being mentally unstable.· The resulting uncertainty as to whether she was coming or going had made her, to some extent, mentally unstable.
· Reactions have varied, but it's universally agreed that the preview is way too unstable and slow for everyday use.· He was not yet five, and her life seemed too unstable there.· Fears remain, however, that the area is too unstable for any such measures to be effective.· They were too unstable to be transported.
· The situation there remains very unstable.· These resonant orbits are very unstable.· It was potentially extremely dangerous and although it had survived since the war it may have been very unstable.· Handy rejects a full-blown version of this vision on the grounds that such a divergent society would be very unstable.· For the moment everything seemed calm, but under the surface the whole situation was very unstable.· Other places, particularly the tropical Far East have been very unstable over the last 15 million years.
NOUN
· Contraindications to exercise training include unstable angina pectoris, ventricular arrhythmias, and severe aortic stenosis.· Sophia has unstable angina and is refusing surgery from which she might benefit.
1likely to change suddenly and become worse → instability:  The political situation is still very unstable. an unstable relationship2something that is unstable is likely to move or fall3someone who is unstable changes very suddenly so that you do not know how they will react or behave:  a mentally unstable man4an unstable chemical is likely to separate into simpler substances
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更新时间：2025/1/24 1:25:47