unreliable

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

ruОписывает кого-то или что-то, чему нельзя доверять в плане стабильной работы или точности.esSe dice de alguien o algo en quien no se puede confiar para que funcione de manera constante o sea preciso; que falla o decepciona con frecuencia o no cumple lo esperado.frQualifie une personne ou une chose à qui l'on ne peut pas se fier pour fonctionner de manière stable ou être exacte.deBeschreibt jemanden oder etwas, dem man sich nicht auf stabile Funktionsweise oder Genauigkeit verlassen kann.ptDescreve alguém ou algo em que não se pode confiar quanto à estabilidade, exatidão ou cumprimento do que se espera.zh形容某人或某物不可信赖，在稳定性或准确性方面靠不住。arيصف شخصًا أو شيئًا لا يمكن الاعتماد عليه أو الوثوق به من حيث الأداء المستقر أو الدقة أو الوفاء بالوعود.

1. Prone to error or deception B2 formal

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

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   • He dismissed the data as unreliable and outdated.

   ruНенадёжныйespoco fiable (propenso a error o engaño)frqui peut être erroné ou trompeurdeUnzuverlässigptNão confiávelzh不可靠的arغير موثوق

   المرادفات: deceptiveerroneousfalliblefaultyflawedinaccuratemisleadingundependableuntrustworthy

   الأضداد: accuratecorrectdependablereliabletrustworthytruthful

2. Not dependable B1 formal

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

   • 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.

   ruНенадёжныйesNo fiablefrNon fiable, peu digne de confiancedeUnzuverlässigptNão confiávelzh不可靠arغير موثوق

   المرادفات: deceitfuldisloyalfickleinconstantirresponsibletreacherousundependableunfaithfulunpredictableuntrustworthy

   الأضداد: dependablefaithfulreliableresponsibletrustworthy

3. Unstable and unpredictable B2 formal

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

   • 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.

   ruНенадёжный и непредсказуемыйesPoco fiable e impredeciblefrInstable et imprévisibledeUnzuverlässig und unberechenbarptInstável e imprevisívelzh不可靠且难以预测arغير موثوق وغير متوقع

   المرادفات: capriciouschangeableerraticficklefluctuatingmercurialunpredictablevolatile

   الأضداد: consistentdependablepredictablestabletrustworthy

4. Lacking responsibility B2 informal

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

   • 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.

   ruБезответственныйesFalta de responsabilidadfrPeu fiable, manquant de responsabilitédeVerantwortungslosptIrresponsávelzh不负责任arغير مسؤول

   المرادفات: carelessirresponsiblenegligentrecklessthoughtlessundependableuntrustworthy

   الأضداد: accountabledependablereliableresponsibletrustworthy

• more unreliable comparative form
• most unreliable superlative form