Indefinite articles in Italian - Gli articoli indeterminativi in italiano

Indefinite articles in Italian are used to indicate a generic, non-specific element and vary according to the gender of the noun they follow. They can precede either a noun or an adjective, and their forms change depending on whether the noun is masculine or feminine. The indefinite articles in Italian are UN, UNO for the masculine and UNA, UN' for the feminine. Each form is used in specific contexts according to the word that follows it. Italian indefinite articles follow similar rules to definite articles in the singular.

Masculine indefinite articles

UN is used in front of masculine words that begin with a vowel or consonant (except for special consonants that require ‘uno’).

For examples:

  • un cavallo (like il cavallo)
  • un uomo (like l’uomo)
  • UNO is used in front of masculine words beginning with (See definite articles article):

    • s + consonant → e.g. uno studente
    • z → e.g. uno zaino
    • ps → e.g. uno psicologo
    • gn → e.g. uno gnomo
    • → e.g. uno xylofono
    • → e.g. uno yogurt
    This choice of 'UN' or 'UNO' therefore follows the same rules as the masculine singular definite article (the/the) and allows for a smoother pronunciation.

    Feminine indefinite articles

    UNA is used before feminine words that begin with a consonant.

    For examples:

  • una ragazza (like la ragazza)
  • una mela (like la mela)
  • UN', with an apostrophe, is used before feminine words that begin with a vowel, dropping the final 'a' of UNA:

  • un’amica (like l’amica)
  • un’isola (like l’isola)
  • General rule

    • The masculine UN is used for words beginning with a vowel or consonant, and a for words beginning with s + consonant, z, ps, gn, x or yun amico, uno studente, uno zaino, uno psicologo, uno gnomo, uno xilofono, uno yogurt.
    • The feminine UNA is used for words beginning with a consonant and UN' for words beginning with a vowel: una casa, una torta, un'ape (una ape), un'amica (una amica).

    The indefinite articles in Italian are UN, UNO for the masculine and UNA, UN' for the feminine. Each form is used in specific contexts according to the word that follows it. Italian indefinite articles follow similar rules to definite articles in the singular.

    The apostrophe

    Masculine: UN  and UNO

    The masculine indefinite article is UN and never has an apostrophe before words that begin with a vowel. This is because the masculine UN is already a shortened form of UNO and, unlike the feminine, does not need an apostrophe. 

    For examples:

  • un amico (not un’amico)
  • un albero (not un’albero)
  • Feminine: UNA and UN'

    For the feminine, the indefinite article is UNA, which changes to UN' with an apostrophe before words that begin with a vowel. This is done by elision to avoid two consecutive vowels. 

    Here are some examples:

  • una amica becomes un’amica
  • una idea becomes un’idea
  • The elision rule

    The absence of elision in the masculine indefinite article UN is a grammatical rule of Italian, linked to both historical and structural reasons. Let's see why.

    1. The article UN is already a contracted form of UNO. This contraction eliminates the need for an 'a' or other final vowel, so the masculine UN has never had to be omitted. There is no extra vowel to drop, as there is with the feminine UNA.
    1. Italian grammar does not require the masculine UN to be omitted simply because its form is considered complete even without additional vowels. The form UN is grammatically correct and does not require an apostrophe.
    1. Difference between UN and UNA: the feminine 'una' is not a contracted form and the final 'a' is elided (dropped) to form UN' before a word beginning with a vowel. This follows the Italian rules of elision that apply to various feminine words (such as "l'amica " from "la amica").

    In short, the absence of elision in the masculine article UN is a convention that is historically established and maintained in Italian grammar rules.

    To recapitulate

    Masculine: UN (without apostrophe) - e.g. un uomo, un albero

    Feminine: UNAUN' before a vowel - e.g. un’amica, un’isola

    To conclude

    The correct use of the indefinite article in Italian is essential for clear and fluent communication. Remember that the masculine never needs an apostrophe, while the feminine uses it to avoid the sound of two consecutive vowels. Practising these rules will help you feel more confident when constructing sentences in Italian and will make your language more natural.


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