Coal tar can be injurious to health. Coal tar is also used to manufacture paints, synthetic dyes (notably tartrazine/Yellow #5), and photographic materials. In the coal gas era, there were many companies in Britain whose business was to distill coal tar to separate the higher-value fractions, such as naphtha, creosote and pitch. A great many industrial chemicals were first isolated from coal tar during this time. These companies included: Side effects of coal tar products include skin irritation, sun sensitivity, allergic reactions, and skin discoloration. It is unclear if use during pregnancy is safe for the baby and use during breastfeeding is
English words of Greek origin πρεσβύτερος ("presbýteros" 'elder'), and "church" < Old English "cirice", "circe" < probably κυριακή [οἰκία] ("kȳriakḗ [oikía]" 'lord's [house]'). In some cases, the orthography of these words was later changed to reflect the Greek – and Latin – spelling: "e.g.", "quire" was respelled as "choir" in the 17th century. Sometimes this was done incorrectly: "ache" is from a Germanic root; the spelling "ache" reflects Samuel Johnson's incorrect etymology from Greek ἄχος. Many more words were borrowed by scholars writing in Medieval and Renaissance Latin. Some words were borrowed in essentially their original meaning, often transmitted through classical Latin: "topic", "type", "physics",