efficient
Working well without wasting time, energy, money, or effort.
ExampleAn efficient way to study is to review mistakes immediately after practice.
ExampleOnline booking can make the process more efficient.
Usage Scenarios
Evaluating a method
Use efficient when you explain why one way works better than another.
ExampleThis method is efficient because students can correct mistakes right away.
Suggesting a solution
Use it when your solution saves time, effort, or resources.
ExampleA shared calendar would make the group project more efficient.
Usage Guide
Use efficient when something achieves a result with less waste. In DET writing, it is useful for education, technology, transport, work, and time-management topics.
Efficient usually describes a method, system, process, way, tool, or person. It is stronger than good because it explains that the benefit is saving time, energy, money, or effort.
The comparative form more efficient is very useful in opinion answers: online classes can be more efficient for busy students because they save travel time.
Word Forms & Word Building
Efficient belongs to the effect and efficiency word family: the learner idea is producing a result without waste.
Efficiency is the noun, formed with the suffix -cy, and means the quality of working without waste: improve efficiency.
Efficiently is the adverb, formed with the suffix -ly, and describes how an action is done: work efficiently, study efficiently.
Meaning Boundaries
Efficient vs effective
Effective means it works. Efficient means it works without wasting resources. A method can be effective but not efficient.
Efficient vs convenient
Convenient means easy for the user. Efficient focuses on saving time, energy, money, or effort.
Register
Efficient is neutral and useful in DET writing and speaking, especially for school, work, travel, and technology topics.
Best contexts
Use efficient with methods, systems, processes, tools, schedules, transport, study habits, and services.
Memory Tricks
Think less waste. If your idea saves time, effort, money, or energy, efficient may fit.
Pair it with practical nouns: efficient method, efficient system, efficient way, efficient process.
In DET writing, add because after efficient so the benefit is specific.
Common Traps
Do not use efficient when you only mean comfortable or enjoyable.
Do not confuse efficient with sufficient. Sufficient means enough; efficient means not wasteful.
For people, efficient can sound work-focused. Use it when the person organizes tasks well.