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How do I know if a Spanish noun is masculine or feminine?

3 min readPublished 9 October 2026

Short answer

Most of the time, the ending tells you. Nouns ending in -o are usually masculine (el libro) and nouns ending in -a are usually feminine (la casa). Several other endings are very reliable: -ción, -sión, -dad, -tad, -tud, -umbre are feminine (la canción, la ciudad), while -aje and most -or nouns are masculine (el viaje, el color). Many words of Greek origin ending in -ma are masculine: el problema, el sistema, el idioma.

For everything else — and for the well-known exceptions such as el día and la mano — learn every noun together with its article.

Endings that tell you the gender

EndingGenderExamplesNotable exceptions
-omasculineel libro, el vasola mano, la foto, la moto, la radio
-afemininela casa, la mesael día, el mapa, el sofá, el planeta
-ma (Greek origin)masculineel problema, el tema, el clima, el idiomala cama, la forma (not Greek -ma)
-ción, -siónfemininela canción, la televisión—
-dad, -tadfemininela ciudad, la libertad—
-tud, -umbrefemininela actitud, la costumbre—
-ajemasculineel viaje, el garaje—
-ormasculineel color, el amorla flor

La foto, la moto and la radio keep the gender of the longer words they come from: la fotografía, la motocicleta, la radiodifusión.

Nouns for people

Many nouns for people change their ending: el profesor / la profesora, el niño / la niña. Others stay the same and only the article changes: el estudiante / la estudiante, el periodista / la periodista, el cantante / la cantante.

Feminine nouns with “el”: el agua

Feminine nouns that begin with a stressed a- take el in the singular, to avoid two “a” sounds colliding — but they are still feminine:

  • el agua fría

    cold water

    feminine adjective: fría

  • las aguas

    the waters

    plural returns to las

  • el águila

    the eagle

    stressed á-

  • el hacha

    the axe

    silent h, stressed a-

Nouns whose gender changes the meaning

MasculineFeminine
el capital — money, capital (economics)la capital — capital city
el orden — order, arrangementla orden — an order, a command
el corte — a cutla corte — the royal court
el cometa — a cometla cometa — a kite
el frente — the front (military, weather)la frente — the forehead

Why it matters

Gender affects more than the article. Adjectives, demonstratives and pronouns agree with the noun:

  • el coche nuevo, este coche, lo compré

    the new car, this car, I bought it

  • la casa nueva, esta casa, la compré

    the new house, this house, I bought it

So a wrong gender usually produces two or three mistakes in one sentence.

Common mistakes

  • Not: la problema

    Better: el problema

  • Not: el mano

    Better: la mano

  • Not: la día

    Better: el día

  • Not: el agua frío

    Better: el agua fría

    agua is feminine, even with el

  • Not: el ciudad

    Better: la ciudad

How to learn gender efficiently

  1. Always learn the article with the noun: not mesa, but la mesa.
  2. Learn the exceptions as a small list: el día, el mapa, el problema, el idioma, la mano, la foto, la flor.
  3. Use colour: write masculine nouns in one colour and feminine in another in your notes or cards.
  4. Learn nouns in short phrases with an adjective: la mano izquierda, el día largo — the agreement trains your ear.
  5. Notice endings when you meet new words, and check the rule.

In short

  • -o is usually masculine, -a usually feminine.
  • -ción, -sión, -dad, -tad, -tud, -umbre are feminine; -aje and most -or are masculine; Greek -ma words are masculine.
  • Feminine nouns with stressed a- take el in the singular: el agua fría.
  • Learn every noun with its article, and the main exceptions as a list.

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