efficient

экономи́чный

Making good, thorough, or careful use of resources; not consuming extra. Especially, making good use of time or energy

• This house is energy efficient.

  Этот дом энергосберегающий.

  Tatoeba · Hybrid · CC BY 2.0 FR

• There must be a more efficient way to do this.

  Должен быть более экономный способ это сделать.

  Tatoeba · CK · CC BY 2.0 FR

экономи́чный

Expressing the proportion of consumed energy that was successfully used in a process; the ratio of useful output to total input

экономи́чный

effective, efficacious

экономи́чный

Causing effects, producing results; bringing into being; initiating change (rare except in philosophical and legal expression efficient cause = causative factor or agent)редкое