from Wiktionary, Creative Commons Attribution/Share-Alike License
- Pertaining to stupor, sleep, or a state of unconsciousness.
- Of or pertaining to narcotics or their trade and use.
From Ancient Greek ναρκόω (narkoō, "I put to sleep"); in terms relating to drugs, it is a back-formation from narcotics, which ultimately derives from the same source. (Wiktionary)