Words with X

History of the letter X

It has a distinctive position within the alphabet due to its relatively infrequent use in English vocabulary, often appearing in words derived from Greek, where "X" represents the letter Chi. Phonetically, "X" can produce multiple sounds, the most common being the voiceless velar fricative combined with a voiceless alveolar sibilant (/ks/), as heard at the end of "box" or in the middle of "exactly." In initial positions, it often sounds like "z," exemplified by "xylophone." The shape of "X" and its symmetrical appearance have made it symbolically versatile, often used to represent the unknown in algebra and other scientific fields, as a marker for incorrect answers or deletions, and to signify a cross or intersection. Beyond linguistics, "X" harbors significant importance in various domains. In mathematics, it is conventionally used to denote an unknown quantity, a practice that dates back to algebra's early development. In genetics, "X" identifies one of the sex chromosomes, X and Y, crucial for determining sex in mammals, including humans. In popular culture, "X" is synonymous with mystery, treasure maps ("X marks the spot"), and is often used in branding to convey cutting-edge technology or edginess. Moreover, "X" acts as a symbol for signatures by those who cannot write, representing affirmation or consent. This multifaceted character makes "X" a letter of intriguing phonetic rarity and rich symbolic resonance across various disciplines and societal expressions.

Words that start with X