lethargy - Master This Word
Master this word with our 5-step learning method – Learn English in English
lethargy Word Meanings
- a state of sluggishness and inactivity
- extreme tiredness or lack of energy
lethargy Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
lethargy Phonetic & Pronunciation
UK
/ˈlɛθ.ə.dʒi/
US
/ˈlɛθ.ɑːr.dʒi/
lethargy Word Etymology
The root 'lethargy' comes from the Greek 'lethargia', from 'lethe' (oblivion) and 'ergon' (work). Historically, it transformed from Greek into Latin and then into Old French before reaching English. Picture a languid sloth, too tired to even think about moving—a vivid reminder of lethargy.
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
Lethargy is a state of sluggishness and inactivity that can range from mild fatigue to a deeper loss of energy and motivation. It often sits between tiredness and apathy, making ordinary tasks seem disproportionately hard. In medical terms it can signal illness or a side effect of medications, yet in everyday speech it describes a mood or day when you feel unusually slow or slow to react. People describe mornings after poor sleep as lethargic, or a long stretch of routine work that drains curiosity. The word carries a historical sense of a mind dulled by Lethe’s oblivion, contrasting sharp alertness with a heavy, stumbling pace.
Usage Reminders
- Lethargy describes both physical sluggishness and mental dullness.
- Do not confuse lethargy with simple tiredness.
- Pair lethargy with verbs like feel, become, suffer from, or experience.
- Use adjectives lethargic to describe a person or mood.
- Avoid overusing when you mean fatigue; choose other words.
Common Misconceptions
- Lethargy = laziness
- Lethargy only happens when you're sick
- It's the same as fatigue
- It's always a medical term
- You must be lethargic to use the word
Thinking Differences
In English, lethargy is used for both medical and everyday tiredness, so learners should distinguish between being sleepy, physically slow, and emotionally low.
Learning Tips
- Learn common collocations: lethargy with feel, become, suffer from, experience
- Differentiate lethargy from fatigue and laziness
- Know the adjective: lethargic
- Practice medical vs. informal contexts
- Use examples with both physical and mental states
- Watch for idioms that imply sluggish behavior
5-Step Learning Method - Learn English in English
Step 1: Meaning
What does 'lethargy' mean?
A.A feeling of excitement
B.A state of sluggishness and inactivity
C.A type of food
D.A form of exercise
Step 2: Usage
Which sentence uses 'lethargy' correctly?
A.His lethargy was apparent when he decided to run a marathon.
B.The lethargy of the car engine made it run faster.
C.After a long day, she felt a wave of lethargy and decided to go to bed early.
D.They planned a lethargy party to celebrate.
Step 3: Similar Words
Which word is most similar to 'lethargy'?
A.Drowsiness
B.Vigor
C.Happiness
D.Energy
Step 4: Opposite Words
What is the opposite of 'lethargy'?
A.Excitement
B.Inactivity
C.Indifference
D.Tiredness
Step 5: Mastery
Can you think of a real-life context where someone might feel lethargic?
A.After a long sleepless night, someone might feel very unmotivated and take a nap.
B.A student studied all night for an exam and felt energized in the morning.
C.During a fun day at the amusement park, everyone was lively and active.
D.A person just finished a marathon and is eager to run another.
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