easy
Too little sleep can be unhealthy.
What does Unhealthy mean?
Unhealthy means not healthy.
Dictionary definition
Unhealthy means not good for health, growth, or well-being.
Example sentences
Unhealthy in a sentence
medium
The plant looked unhealthy because its leaves were yellow and dry.
hard
Students discussed how an unhealthy routine can affect energy, focus, and mood over time.
Writing practice
Ready to write your own? Study the examples, then practice unhealthy in a sentence with Sentence Builder checklist feedback.
Quick practice
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Practice the meaning of Unhealthy
Answer three quick questions about its meaning and related words.
Question 1 of 3
Practice 1
What does unhealthy mean?
Unhealthy describes something that does not support health, growth, or well-being.
Practice 2
Which word is a useful contrast for unhealthy?
Healthy is the direct contrast because unhealthy means not healthy.
Practice 3
Which sentence uses unhealthy correctly?
A plant without enough water may not show good health or growth.
Practice complete
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You completed 3 questions.
Pronunciation coach
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Unhealthy
Voice settings
Sounds like
un · hel · thee · strongest beat: hel
Tap each sound part, then blend the whole word together.
Learn
WordUnhealthy.
Partadjective.
MeaningUnhealthy means not healthy.
ExampleExample: Too little sleep can be unhealthy.
Word breakdown
3 syllables. Say each part, then blend the word.
- Syllables
- un · hel · thee
- Strongest beat
- hel
- Ending
- thee
- Tip
- Put a little extra energy on hel.
Your turn
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Nice work—you practiced unhealthy.
Synonyms
Words like Unhealthy
harmfulUse when something may cause damage or problems.
poor for healthUse when something does not support good health.
Antonyms
Opposite words
healthyUse when something supports health or growth.
beneficialUse when something is helpful or good for someone.
Synonym practice
Want to practice unhealthy synonyms in context? Try a Synonym Search question like "Skipping sleep is an unhealthy habit," then compare close word choices. Practice unhealthy synonyms.
Word family
Unhealthy word family
Related words
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Student support
Understand Unhealthy
Hint for students
Unhealthy means not supporting health, growth, or well-being. It can describe food, routines, habits, plants, places, or conditions.
Common mix-up
Do not use unhealthy to judge a person's worth or appearance. Use it carefully for habits, conditions, or signs that do not support well-being.
Try it in class or at home
Write one sentence that shows unhealthy without using the word unhealthy. Then underline the clue words that show poor health, poor growth, or something not supporting well-being. Example: The plant's leaves turned brown after weeks without water or sunlight. Clue words: leaves turned brown, weeks without water, sunlight Now try your own sentence. Ask: Does my sentence show something not supporting health, growth, or well-being?
Teacher prompt
Ask students to explain this model sentence: "The plant looked unhealthy because its leaves were yellow and dry." Why does unhealthy fit better than healthy?
Learning activities
Practice Unhealthy and explore more word games
Cards labelled “Practice UNHEALTHY” keep this word in focus. Explore cards open games with other words.
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Sentence Builder
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Vocabulary Match
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Context Clue Challenge
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Use context clues
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Synonym Search
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