Trivial name of vitriol" (sulfuric acid), and "cream of tartar" (potassium bitartrate) borrowed their language from the kitchen. Many more names were based on color; for example, hematite, orpiment, and verdigris come from words meaning "blood-like stone", "gold pigment", and "green of Greece". Some names are based on their use. Lime is a general name for materials combining calcium with carbonates, oxides or hydroxides; the name comes from a root "sticking or adhering"; its earliest use was as mortar for construction. Water has several systematic names, including "oxidane" (the IUPAC name), "hydrogen oxide", and "dihydrogen monoxide" (DHMO). The latter was the basis
Oil wrestling it harder for the wrestler grip one's opponent. This form continued to what is today known as Yağlı Güreş or Turkish oil wrestling. In the Ottoman Empire, wrestlers learned the art in special schools called tekke (), which were not merely athletic centres, but also spiritual centres. Wrestlers oil one another prior to matches as a demonstration of balance and mutual respect. If a man defeats an older opponent, he kisses the latter's hand (a sign of respect for elders in Turkey). Matches are held all over Turkey throughout the year, but in early summer, around 1000 competitors gather in