Russian-English translations for эффекти́вный

• effective
  The pill is an effective method of birth control
  The president delivered an effective speech!
  How long does it take to make a bunch of civilians an effective military force?
• efficacious
  This medicine is efficacious
• efficient
  An efficient process would automate all the routine work
  Our cleaners are almost too efficient: they throw away anything left out on a desk
  The motor is only 20% efficient at that temperature
• fruitful
  The extra work in the office turned out to be fruitful after all—I got promoted
• operative
  Hes usually in a good mood — the operative word there being "usually". Today was a disaster.
  an operative motive
  an operative dose, rule, or penalty