noun · academic
efficiency
/ɪˈfɪʃənsi/e·FFI·cien·cy
the ability to do something or produce something without wasting materials, time, or energy
Examples
“The company improved production by investing in more efficient machinery.”
“Improving energy efficiency in homes can cut bills and reduce emissions.”
“Students often learn study techniques that increase efficiency during exams.”
Band 8 sentence
“Improving energy efficiency across the housing sector is one of the most cost‑effective ways to reduce national carbon emissions.”
Collocations
- energy efficiency
- improve efficiency
- high efficiency
Word family
Common mistakes
We must be more efficient in the system.→We must improve the efficiency of the system.
There are many efficiencies in production.→There are many inefficiencies in production.
Say it for a higher band
5speed→6productivity→7+efficiency
Synonyms
productivity
effectiveness
Easily confused
effectiveness
“The new teaching method improved the effectiveness of lessons, but not necessarily their efficiency.”
Related words
Learn this word with the rest of its set, and get reminded at the right time.
In -ity
Learn it with its set