agrypnotic
/ˌæɡrɪpˈnɑtɪk/
adjective
- Causing or relating to sleeplessness; keeping someone awake.
- The agrypnotic effect of the coffee kept her studying all night.
- The bright streetlight outside his window was agrypnotic, disturbing his rest.
- Some medications have an agrypnotic side effect that makes it hard to sleep.
noun
- A substance or agent that prevents sleep.
- He avoided any agrypnotic before bedtime to ensure a good night's sleep.
- The doctor warned that the new drug might act as an agrypnotic.
- Caffeine is a common agrypnotic found in coffee and tea.