You searched for: “agrypnotic”
agrypnotic (ag" rip NAHT ik) (adjective)
Anything which prevents sleep, or produces wakefulness; such as, a drug, strong tea, or coffee.

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This entry is located in the following unit: English Words in Action, Group A + (page 5)
Word Entries at Word Info: “agrypnotic”
agrypnotic
1. Anything administered to produce wakefulness; such as, strong tea or coffee.
2. Of or relating to wakefulness; sleepless.
This entry is located in the following units: agryp- + (page 1) -ic (page 8) -otic + (page 1)