onerous - Master This Word
Master this word with our 5-step learning method – Learn English in English
onerous Word Meanings
- burdensome or oppressive
- involving hardship
- requiring a lot of effort
onerous Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
onerous Phonetic & Pronunciation
UK
/ˈəʊnərəs/
US
/ˈoʊnərəs/
onerous Word Etymology
onero- = burden + -ous = form of, characterized by. Origin: Latin → Old French → English. Picture carrying a heavy load on your back, signifying a difficult task.
Note 1: These definitions and etymologies are not standard dictionary definitions, but extended explanations provided to help with memorization and understanding of the actual application of words. Through this background information, we strive to make words more vivid and easier to understand, and help you remember their meanings in real life.
Note 2: LexiTalk designs the learning flow around the linguistics principle of “Comprehensible Input.” When learners encounter material that is slightly above their level but still understandable from context, the brain naturally absorbs the language. That’s why we keep every word inside authentic contexts, using examples and associations to help you understand it and use it flexibly.
Read the FAQ explanation of Comprehensible InputReal Context
Onerous is a formal, slightly old-fashioned adjective used for tasks, duties, or obligations that feel heavy, demanding, or oppressive. It implies more than mere difficulty, highlighting the weight of responsibility, time, or cost involved. You might speak of onerous paperwork that will take hours to complete, or an onerous contract with strict penalties. In everyday speech you may simply say hard or burdensome, but onerous carries a sense of burden and seriousness, often in professional or legal contexts. Learners often confuse it with merely difficulty or inconvenience, or assume it only applies to physical strain. Note the word is typically followed by nouns like duty, obligation, burden, or process.
Usage Reminders
- Use with formal nouns like task, duty, obligation, contract.7 Avoid implying a person is annoying; it focuses on burden and cost.8 Reserve for professional or legal contexts.9 Pair with heavy costs or time.10 Typical collocations include onerous obligation, onerous contract, onerous duties.11 Consider subtle nuance vs difficult or burdensome.12
Common Misconceptions
- It only means 'difficult' in everyday sense
- It refers to annoyance, not burden
- It can describe people or individuals
- It equals costly in financial terms only
- It is interchangeable with hard without tone change
Thinking Differences
Onerous in English signals a heavy burden or cost, often in formal or legal contexts; learners usually overextend it to any difficulty or annoyance and miss its connotation of resource drain.
Learning Tips
- memorize collocations: onerous task, onerous obligation, onerous contract
- compare with burdensome and arduous to feel nuance
- note formal tone; reserve for professional/legal contexts
- watch for accompanying nouns like duty, burden, cost
- practice with financial vs time cost differences
- distinguish from annoying or inconvenient in everyday speech
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the meaning of the word 'onerous'?
A.Simple
B.Complicated
C.Difficult
D.Easy
Step 2: Usage
In which sentence is 'onerous' used correctly?
A.She completed the onerous task easily.
B.He found the task onerous and challenging.
C.The project was not onerous at all.
D.The assignment was simple and onerous.
Step 3: Similar Words
Which is a synonym for 'onerous'?
A.Burdensome
B.Light
C.Simple
D.Effortless
Step 4: Opposite Words
What is the opposite of 'onerous'?
A.Complex
B.Challenging
C.Lightweight
D.Easy
Step 5: Mastery
In what real-life situation would the word 'onerous' be used?
A.Watching a funny movie
B.Looking at beautiful flowers
C.Eating a delicious meal
D.Completing a difficult puzzle
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