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[[Image:lighterstill.jpg]][[Image:Chaotic_dynamics.jpg|right|frame]]

'''Chaos''' (pronounced kayos) (derived from the [[Ancient Greek]] {{Polytonic|Χάος}}, ''Chaos'') typically refers to [[unpredictability]], and is the antithesis of [[cosmos]].

'''Chaos''' (pronounced kayos) (derived from the Ancient Greek Χάος, ''Chaos'') typically refers to [[unpredictability]], and is the antithesis of [[cosmos]].

The word χάος did not mean "disorder" in classical-period ancient Greece. It meant "the primal emptiness, space". ''Chaos'' is derived from the Proto-Indo-European root ''ghn'' or ''ghen'' meaning "gape, be wide open": compare "chasm" (from Ancient Greek χάσμα, a cleft, slit or gap), and Anglo-Saxon ''gānian'' ("yawn"), ''geanian, ginian'' ("gape wide"); see also Old Norse Ginnungagap. Due to people misunderstanding early Christian uses of the word, the meaning of the word changed to "disorder". (The Ancient Greek for "disorder" is ''ταραχή'').

The word χάος did not mean "disorder" in classical-period ancient Greece. It meant "the primal emptiness, space". ''Chaos'' is derived from the Proto-Indo-European root ''ghn'' or ''ghen'' meaning "gape, be wide open": compare "chasm" (from Ancient Greek χάσμα, a cleft, slit or gap), and Anglo-Saxon ''gānian'' ("yawn"), ''geanian, ginian'' ("gape wide"); see also Old Norse Ginnungagap. Due to people misunderstanding early Christian uses of the word, the meaning of the word changed to "disorder". (The Ancient Greek for "disorder" is ''ταραχή'').