Meaning & use
anti-sleep
Last updated
Meaning
adjectivebefore a nouninformal
Designed to keep someone awake or to prevent sleep.
Grammar: Used before a noun: anti-sleep medication, anti-sleep alarm. It is not usually used after a verb.
Patterns
- anti-sleep medication
- anti-sleep device
- anti-sleep alarm
He took anti-sleep pills to stay awake during the long drive.
The anti-sleep alarm rings if the driver's head nods forward.
Some students rely on anti-sleep drinks before exams.
Common combinations
- anti-sleep medication
- Anti-sleep medication can have side effects like jitteriness.
- anti-sleep device
- Truckers often use an anti-sleep device on long hauls.
- anti-sleep alarm
- The anti-sleep alarm woke him just in time.
Synonyms and how they differ
- wakefulness-promoting
- More formal and medical; used in clinical contexts.
- stimulant
- A noun for a substance that keeps you awake; not an adjective.
Opposites
Word family
- anti-sleeping adjective
- Less common variant meaning the same.
Commonly confused: anti-sleep or anti-sleeping?
anti-sleep vs anti-sleeping
Both exist, but 'anti-sleep' is more common in product names.
Practice
Which sentence uses 'anti-sleep' correctly?
Choose one answer.
'Anti-sleep' is an adjective used before a noun, as in 'anti-sleep alarm'. Option 0 uses it as an adjective after a linking verb, which is not standard; option 2 uses it as a noun, and option 3 as a verb, both incorrect.
Make it your own
Write a sentence using “anti-sleep”, then check it and compare it with the examples above.