In some models of phonology as well as morphophonology in the field of linguistics, the underlying representation (UR) or underlying form (UF) of a word or morpheme is the abstract form that a word or morpheme is postulated to have before any phonological rules have applied to it. By contrast, a surface representation is the phonetic representation of the word or sound. The concept of an underlying representation is central to generative grammar. If more phonological rules apply to the same underlying form, they can apply wholly independently of each other or in a feeding or counterbleeding order...

Sor Juana Inés de la Cruz, O.S.H. (English: Sister Joan Agnes of the Cross; 12 November 1651 – 17 April 1695), was a self-taught scholar, philosopher and poet of the Baroque school, and Hieronymite nun of New Spain, known in her lifetime as "The Tenth Muse", "The Phoenix of America", or the "Mexican Phoenix". Sor Juana lived during Mexico's colonial period, making her a contributor both to early Mexican literature as well as to the broader literature of the Spanish Golden Age. Beginning her studies at a young age, Sor Juana was fluent in Latin and also wrote in Nahuatl, and became known for her...