Meaning

noun something that resembles a tablet of medicine in shape or size

noun a dose of medicine in the form of a small pellet

noun a unpleasant or tiresome person

originFrom Middle English *pill, *pyll, from Old English pyll (“a pool, pill”), from Proto-Germanic *pullijaz (“small pool, ditch, creek”), diminutive of Proto-Germanic *pullaz (“pool, stream”), from Proto-Indo-European *bl̥nos (“bog, marsh”). Cognate with Old English pull (“pool, creek”), Scots poll (“slow moving stream, creek, inlet”), Icelandic pollur (“pond, pool, puddle”). More at pool.

Etymology from Wiktionary, CC BY-SA 3.0