S, or s, is the nineteenth letter of the Latin alphabet, used in the English alphabet, the alphabets of other western European languages and other latin alphabets worldwide., S is the nineteenth (number 19) letter in the English alphabet. On calendars, S is most times the short letter for Saturday or Sunday, or the month September. In chemistry, S is the symbol for sulphur. In Wheel of Fortune, S is one of the six letters given to any contestant participating in the "Bonus Round.", It originated as the Phoenician symbol for a voiceless sibilant. The Greeks adopted it as the letter sigma (Σ), with lower-case variants according to its position in a word: medial (σ) and final (ζ). The Etruscans and then the Romans further adapted the form to create S., Forming the possessive singular of most nouns and noun phrases and of some pronouns. A child's game, the defense attorney's case, the Senator from Maine's bill, one's own ideas., Letter s is one of the consonants that vary. s = /s/ at the beginning of words: sand, sell, sip, soft, sun. It is also the sound of /s/ in beginning s blends: scuff, smell, sniff, spill, stop, swim. s at the end of words can be either /s/ or /z/: cats /s/ and dogs /z/ need baths /s/ with suds /z/., .