efficacy russian

• си́ла

  power, might, strength, force

  vigor, vigour, intensity

  energy, efficacy, ability

• де́йствие

  action, activity, operation, act

  effect, influence, impact

  efficacy, valitity

• эффекти́вность

  effectiveness, efficiency, efficacy, efficaciousness

• де́йственность

  effectiveness, efficacy, activity, effectualness

• радика́льность

  radicalism, efficacy