means Caffeine: a bitter alkaloid stimulant found in coffee, tea, and chocolate that blocks sleep signals in your brain for 5-6 hours and makes you feel like you have more thoughts than usual.

from First isolated in 1819 from coffee beans by German chemist Friedlieb Ferdinand Runge, who called it Kaffein. The name traces to Arabic qahwa (wine, or that which prevents appetite), though whether coffee actually came from Ethiopia or Yemen remains delightfully disputed among historians who probably discovered this fact over caffeine.