easy
Please unfasten your backpack strap.
What does Unfasten mean?
Unfasten means to open or loosen something fastened.
Dictionary definition
To unfasten means to open or loosen something that was closed, tied, or attached.
Example sentences
Unfasten in a sentence
medium
The teacher helped a student unfasten the stuck clasp on the art box.
hard
Before repairing the model, the group had to unfasten each clip without bending the frame.
Writing practice
Ready to write your own? Study the examples, then practice unfasten in a sentence with Sentence Builder checklist feedback.
Quick practice
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Practice the meaning of Unfasten
Answer three quick questions about its meaning and related words.
Question 1 of 3
Practice 1
What does unfasten mean?
Unfasten means to release something that was closed, tied, clipped, or attached.
Practice 2
Which word is closest in meaning to unfasten?
Loosen is close in meaning because unfastening makes something less tight or attached.
Practice 3
Which word is a useful contrast for unfasten?
Fasten is the direct contrast because it means close or attach securely.
Practice complete
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Unfasten
Voice settings
Sounds like
un · fas · un · strongest beat: fas
Tap each sound part, then blend the whole word together.
Learn
WordUnfasten.
Partverb.
MeaningUnfasten means to open or loosen something fastened.
ExampleExample: Please unfasten your backpack strap.
Word breakdown
3 syllables. Say each part, then blend the word.
- Syllables
- un · fas · un
- Strongest beat
- fas
- Ending
- un
- Tip
- Put a little extra energy on fas.
Your turn
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Nice work—you practiced unfasten.
Synonyms
Words like Unfasten
Antonyms
Opposite words
Synonym practice
Want to practice unfasten synonyms in context? Try a Synonym Search question like "Please unfasten the strap before opening the box," then compare close word choices. Practice unfasten synonyms.
Word family
Unfasten word family
Base word
fasten
verb
unfasten
To open or loosen something fastened.
verb
unfastens
Opens or loosens something fastened.
verb
unfastened
Opened or loosened something fastened.
verb
unfastening
Opening or loosening something now.
Related words
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Student support
Understand Unfasten
Hint for students
Unfasten means to open, loosen, or release something that was closed, tied, clipped, or attached.
Common mix-up
Do not confuse unfasten with break. You can unfasten something carefully without damaging it.
Try it in class or at home
Write one sentence that shows unfasten without using the word unfasten. Then underline the clue words that show opening, loosening, or releasing something attached. Example: Maya opened the metal clip and slipped the tag off the bag. Clue words: opened, metal clip, slipped, tag off the bag Now try your own sentence. Ask: Does my sentence show something being released from a fastened position?
Teacher prompt
Ask students to explain this model sentence: "The teacher helped a student unfasten the stuck clasp on the art box." Why does unfasten fit better than fasten?
Learning activities
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