ineffective

Describes something that does not produce the desired effect or result; not effective.

ruОписывает что-то, что не даёт желаемого эффекта или результата; неэффективный.esDescribe algo que no produce el efecto o resultado deseado; que es inútil o no funciona adecuadamente.frDécrit quelque chose qui ne produit pas l'effet ou le résultat souhaité; inefficace.deBeschreibt etwas, das nicht die gewünschte Wirkung oder das erwartete Ergebnis erzielt; ohne Erfolg oder Nutzen.ptDescreve algo que não produz o efeito ou resultado desejado; que não funciona como esperado.zh指没有产生预期效果或结果的；不起作用的。arيصف شيئًا لا يحقق الأثر أو النتيجة المرجوة؛ عديم الجدوى أو النفع.

1. Not producing an intended effect B2 formal

   Failing to achieve the desired result or purpose.

   • The medication proved ineffective against the new strain.
   • His attempts to negotiate were ineffective.
   • The marketing campaign was largely ineffective and did not boost sales.

   ruНеэффективныйesineficazfrinefficace (qui ne produit pas l'effet attendu)deIneffektivptIneficazzh无效的arغير فعّال

   Синонимы: fruitlessfutileineffectualinefficaciousinefficientunavailingunproductiveunsuccessfuluselessvain

   Антонимы: effectiveefficaciousoperativepotentproductivesuccessful

2. Lacking power or forcefulness B2 formal

   Without sufficient strength, power, or force to be effective.

   • The speech was ineffective and failed to inspire the audience.
   • Her arguments were ineffective against his clear logic.
   • The protest was ineffective because it was too small.

   ruНеэффективныйesineficaz (sin fuerza o poder)frinefficace (manque de force)deWirkungslosptIneficazzh无效的arغير فعال

   Синонимы: feeblefutileimpotentineffectualinefficaciouspowerlesstoothlessunavailinguselessweak

   Антонимы: effectiveefficaciousforcefulpotentpowerfulstrong

3. Lacking ability or skill B2 formal

   Lacking the necessary skill, competence, or ability to perform effectively; inadequate.

   • He was an ineffective manager who could not lead the team.
   • The teacher was considered ineffective by the parents.
   • She felt ineffective in the new role due to lack of training.

   ruНеэффективныйesineficaz (por falta de capacidad)frincompétentdeUnfähigptIneficazzh无能的arغير فعّال

   Синонимы: inadequateincapableincompetentineptunfitunqualifiedunskilled

   Антонимы: ableadeptcapablecompetenteffectiveefficientproficientskilledskillful

• more ineffective comparative form
• most ineffective superlative form