The letter R is a fascinating one! Interesting Facts: 18th letter of the alphabet: R is the 18th letter in the modern English alphabet. Semitic origin: The letter R originated from the Semitic letter "resh," meaning "head" or "beginning." Voiced alveolar approximant: In phonetics, R represents a voiced alveolar approximant sound, like in "run" or "red." R in Different Contexts: Roman numeral: R is sometimes used as a Roman numeral for 80 (LXXX). Chemistry symbol: R represents an alkyl group or a