English Reference
Adverb

efficiently

adv. manner
B2 Upper Intermediate Oxford US /ɪˈfɪʃəntɫi/ UK /ɪfˈɪʃəntli/ ef·fi·cient·ly

adv.doing something well without wasting time, money, or energy. It means you get the best results with the least amount of effort.

adv.performing a task in a manner that achieves maximum productivity with minimum wasted effort or expense.


SIMPLE

She works efficiently and always finishes her tasks early.

CONTEXTUAL

The new heating system runs more efficiently, which helps the family save money on their monthly energy bills.

COMPLEX

By reorganizing the assembly line, the factory was able to produce twice as many units while using significantly less electricity, proving that the plant now operates more efficiently.

Usage

Typically placed after the verb or the direct object to describe how an action is performed.

Pitfall
He is an efficiently workerHe is an efficient worker

Learners often use the adverb form to modify a noun, but the adjective 'efficient' is required for nouns.

Usage efficiently make

Google patented a non-destructive book-scanning technology in 2009 that AI firms could use to efficiently scan books—if they were willing to slow down and invest in the process.

Ars Technica· 12 Aug 2026

Managing heat efficiently inside solid materials is essential for developing faster, more reliable electronics.

ScienceDaily· 7 Aug 2026

Common in science writing

This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated