efficiency
gb/ɪfˈɪʃənsi/ us/ɪfˈɪʃənsi/
B1
英語
~ 2400
語義
0件の語義
名詞
B1
property
1
ability to work well without waste
The ability to do something well without wasting time, energy, or materials.
用法パターン：
[someone/something]'s efficiency in [doing something]
よくある間違い：
Learners sometimes confuse 'efficiency' with 'effectiveness'. Efficiency is about doing things with less waste; effectiveness is about achieving the goal, regardless of waste.
類義語
effectiveness (Focuses more on producing the desired result, not necessarily with minimal waste.)
|
productivity (Emphasizes the amount of output produced relative to input.)
対義語
inefficiency (Describes poor use of resources, leading to waste or low output.)
コロケーション
improve efficiency
|increase efficiency
|energy efficiency
|operational efficiency
|efficiency gains
テーマ
business
|productivity
|technology
|work
|core_vocabulary
例文
- The new software greatly improved the team's efficiency.
- Energy efficiency is a key factor in reducing costs.
- Regular training can boost employee efficiency.
- The manager praised the efficiency of the assembly line.
- We need to focus on efficiency if we want to meet our deadlines.
学習者向け例文
- The new machine works with high efficiency.
- Better planning will help our efficiency.
- We want to improve the efficiency of the team.
- The car has good fuel efficiency.
名詞
technical
B2
quantity
2
output-to-input ratio in systems
A number that shows how much useful work comes from the energy or effort put in.
用法パターン：
the efficiency of [a system/machine]
よくある間違い：
Learners may confuse the general meaning of 'efficiency' with this technical, measurable ratio. In science and engineering, it has a precise definition.
類義語
performance ratio (More specific technical term used in engineering contexts.)
対義語
loss (Indicates wasted energy or resources in a system.)
コロケーション
mechanical efficiency
|thermal efficiency
|conversion efficiency
テーマ
science
|engineering
|technology
|education
例文
- The engine's efficiency drops at higher speeds.
- Solar panel efficiency has improved over the last decade.
- We measured the pump's efficiency under different loads.
学習者向け例文
- The car engine has low efficiency.
- This motor has 90% efficiency.
- We test the efficiency of the machine.
文法
辞書形
efficiency
IPA
GB/ɪfˈɪʃənsi/
US/ɪfˈɪʃənsi/
音節・強勢
ef - fi - ciency （3音節）
Stress on 2nd syllable (fi)
活用形
Noun
- Base: efficiency
- Plural: efficiencies, efficiency
関連語
Forms
efficiencies
noun
Core family
efficient
adjective B1
efficiently
adverb B2
Negative and opposite forms
表現
energy efficiency
1/ˈɛnɚd͡ʒi ɪfˈɪʃənsi/
fixed phrase
using less energy for same work
Using less energy to do the same job.
例文
- Improving energy efficiency can lower your electricity bills.
- Modern appliances are designed for better energy efficiency.
fuel efficiency
1/fjˈul ɪfˈɪʃənsi/
fixed phrase
distance traveled per fuel amount
How far a vehicle can go using a certain amount of fuel.
例文
- Hybrid cars usually have better fuel efficiency.
- We compared the fuel efficiency of several models.
operational efficiency
1/ˌɑpɚˈeɪʃənəl ɪfˈɪʃənsi/
fixed phrase
formal
smooth and cost-effective operations
How well a company works without wasting money or time.
例文
- They restructured to improve operational efficiency.
- Operational efficiency is critical for staying competitive.