Why this word is great
CACODAEMON — [Noun] A wicked or malevolent spirit, demon, or evil genius. From Ancient Greek κακοδαίμων (kakodaímōn), from κακός (kakós, "bad, evil") and δαίμων (daímōn, "spirit, divinity, genius"). Unlike the neutral daemon, a simple guiding force, or its explicit antithesis agathodemon, a spirit of explicit goodness, a cacodaemon is an entity of pure, dedicated malice. It is the chill that inhabits a sunlit room for no reason, the rasping whisper that finds the precise fissure in one's resolve, and the cold logic that turns a minor mistake into a cascading ruin—the insidious architect of private, perfected malevolence.