unreliable

• 形容某人或某物不可信赖，在稳定性或准确性方面靠不住。

Describes someone or something that cannot be trusted to perform consistently well or to be accurate.

1. Prone to error or deceptionB2formal

   Liable to be incorrect or misleading; not trustworthy in terms of accuracy.

   不可靠的

   • The test results were unreliable due to faulty equipment.
   • Eyewitness accounts can often be unreliable.
   • He dismissed the data as unreliable and outdated.

   同义词deceptiveerroneousfalliblefaultyflawedinaccuratemisleadingundependableuntrustworthy

   反义词accuratecorrectdependablereliabletrustworthytruthful

2. Not dependableB1formal

   Not worthy of being relied upon or trusted to fulfill obligations.

   不可靠

   • She is an unreliable employee who frequently misses deadlines.
   • The old car has become unreliable and breaks down often.
   • He proved to be an unreliable source of information.

   同义词deceitfuldisloyalfickleinconstantirresponsibletreacherousundependableunfaithfulunpredictableuntrustworthy

   反义词dependablefaithfulreliableresponsibletrustworthy

3. Unstable and unpredictableB2formal

   Dangerously unstable and likely to change suddenly, often with negative consequences.

   不可靠且难以预测

   • The ladder was unreliable and wobbled dangerously.
   • The region's power grid is unreliable and prone to blackouts.
   • His mood is unreliable, shifting from calm to angry without warning.

   同义词capriciouschangeableerraticficklefluctuatingmercurialunpredictablevolatile

   反义词consistentdependablepredictablestabletrustworthy

4. Lacking responsibilityB2informal

   Not showing a sense of responsibility or accountability for one's actions.

   不负责任

   • He is too unreliable to be left in charge of the project.
   • Her unreliable behavior frustrated the entire team.
   • They called him unreliable after he failed to show up again.

   同义词carelessirresponsiblenegligentrecklessthoughtlessundependableuntrustworthy

   反义词accountabledependablereliableresponsibletrustworthy