Ninguna

Ninguna is the feminine singular form of the Spanish negative determiner and pronoun used to express the absence or nonexistence of a noun or to indicate none of a defined set. It accompanies feminine singular nouns, such as in ningUna idea (not any idea) or ningUna persona (no person). It is the feminine counterpart to ningún, which appears before masculine singular nouns, and to ninguno, the masculine pronoun.

As a determiner, ningUna directly precedes a noun: “No tengo ninguna idea.” As a pronoun, it can stand alone to replace a feminine noun already understood from context: “¿Cuántas dejaron? Ninguna.” It frequently appears in negative contexts with no: “No hay ninguna posibilidad” and in phrases like “ninguna de las dos,” meaning neither of the two.

Etymology and relation to other forms: ningUna shares its root with ningún and ninguno, all part of the negation family in Spanish and used to express absence or denial. The forms adapt to gender and number to agree with the noun they modify or replace.

Notes on usage: ningUna is common in formal and colloquial Spanish. In conversational speech, speakers may substitute other constructions, especially for plural nouns, but ningUna remains standard when the noun is feminine singular. See also ningún, ninguno, and related negation terms.