Complex sentence: Kykeon (Gr. κυκεών, from κυκάω, "to stir, to mix") was an Ancient Greek drink made mainly of water, barley and naturally occurring substances.
Split into simpler sentences: Kykeon (Gr. κυκεών, from κυκάω, "to stir, to mix") was an Ancient Greek drink of various descriptions. Some were made mainly of water, barley and naturally occurring substances.