Noun gender (masculine/feminine) and number (singular/plural)

Noun gender (masculine/feminine) and number (singular/plural) in Spanish

What do "gender" and "number" mean in Spanish?

In Spanish every noun has two grammatical properties you must learn: gender (masculine or feminine) and number (singular or plural). These are grammatical categories, not always linked to biological sex. Gender determines which articles, adjectives and other words must agree with the noun. Number tells you whether the noun refers to one thing (singular) or more than one (plural).

Examples:
- el libro (the book) — masculine singular
- la mesa (the table) — feminine singular
- los libros (the books) — masculine plural
- las mesas (the tables) — feminine plural

When do I need to care about gender and number?

You must match articles, adjectives, pronouns and many determiners to the noun’s gender and number.

- Article agreement: el libro / la casa / los libros / las casas
- Adjective agreement: un coche rápido / una casa rápida / coches rápidos / casas rápidas
- Pronouns and determiners must also agree: este libro / esta casa / estos libros / estas casas

If these words do not match the noun, the sentence is ungrammatical or sounds wrong to native speakers.

How can I tell whether a noun is masculine or feminine? (Usefulness: rules of thumb, not 100% reliable)

There are common endings that usually indicate gender. Learn them as general patterns, then memorize exceptions.

Common masculine endings (typical examples)
- -o: el libro (the book), el gato (the cat)
- -or: el profesor (the teacher), el amor (love)
- -aje: el viaje (the trip), el garaje (the garage)
- -ma (Greek origin): el problema (the problem), el programa (the program), el tema (the topic)
- consonant endings (often): el papel (the paper), el papelero (the wastebin)

Common feminine endings (typical examples)
- -a: la mesa (the table), la chica (the girl)
- -ción / -sión: la canción (the song), la decisión (the decision)
- -dad / -tad / -tud: la ciudad (the city), la libertad (freedom), la salud (health)
- -ie / -umbre: la serie (the series), la costumbre (the custom)

Adjectives and other words: patterns repeat
Adjectives usually follow the same patterns: alto / alta, trabajador / trabajadora, inteligente (same for both genders).

Important exceptions and irregular nouns

You will meet many exceptions. Study these common ones and check a dictionary when unsure.

- Masculine nouns that end in -a: el día (the day), el mapa (the map), el problema (the problem), el idioma (the language), el clima (the climate)
- Feminine nouns that end in -o: la mano (the hand)
- Nouns with unpredictable gender: la radio (radio/station — feminine), el radio (the radius or the chemical element radium in rare contexts)
- Nouns ending in -ista, -nte, or -e are often the same for both genders; gender is shown by the article: el artista / la artista, el/la estudiante, el/la cliente

How do I form the feminine of nouns that refer to people?

Many nouns for people or professions form a feminine counterpart, but there are irregulars.

- Typical conversions:
- -o → -a: el profesor → la profesora (the teacher)
- -or → -ora: el trabajador → la trabajadora (the worker)
- -ón → -ona: el campeón → la campeona (the champion)
- -és → -esa: el francés → la francesa (the Frenchman / Frenchwoman)
- Invariable endings (use article to show gender): el/la cantante, el/la estudiante, el/la pianista
- Irregular or different-word pairs: el rey → la reina (king → queen), el actor → la actriz (actor → actress)

When a single form covers both sexes (epicene nouns)

Some nouns are the same for masculine and feminine. Use the article or an adjectival specification to show sex.

Examples:
- el artista (a male artist) / la artista (a female artist) — same noun form, different article
- el testigo / la testigo (witness) — often the same form; you can also say testigo hombre / testigo mujer for clarity
- el/de la policía — "el policía" (male police officer) vs "la policía" (police force or female officer) depending on context

Special case: feminine nouns that use el or un in the singular

Feminine nouns that begin with a stressed "a" sound take the masculine singular articles el and un to avoid the repeated vowel sound. However the noun remains feminine and adjectives agree in the feminine.

Examples:
- el agua fría (the cold water) — note: "agua" is feminine, so adjective is feminine: fría
- un águila grande (a big eagle)
- el hacha afilada (the sharp axe)

Important: plural and other forms revert to feminine articles: las aguas frías, unas águilas grandes.

How do I form plurals (number)?

Basic plural rules (straightforward and the ones you will use most):
- If a noun ends in a vowel (a, e, i, o, u), add -s:
- casa → casas (house → houses)
- libro → libros (book → books)
- sofá → sofás (sofa → sofas)
- café → cafés (café → cafés)
- If a noun ends in a consonant (not vowel), add -es:
- papel → papeles (paper → papers)
- ciudad → ciudades (city → cities)
- árbol → árboles (tree → trees)
- If a noun ends in -z, change -z to -c and add -es:
- lápiz → lápices (pencil → pencils)
- luz → luces (light → lights)
- If a noun ends in -s or -x in an unstressed syllable, the plural often does not change:
- el lunes → los lunes (Monday → Mondays)
- el paraguas → los paraguas (umbrella → umbrellas)
- una crisis → dos crisis (crisis → crises)

Note about accented vowels: most nouns ending in an accented vowel simply add -s (sofá → sofás; café → cafés). A few nouns ending in -í or -ú have variant plurals in some dialects; when in doubt, check a dictionary.

How number affects articles and adjectives (agreement in number)

Articles, adjectives and determiners change to agree with singular/plural just as they change for gender.

- Article: el → los, la → las, un → unos, una → unas
- Adjective: add -s for vowel endings, -es for consonant endings where needed

Examples:
- el niño pequeño → los niños pequeños (the small boy → the small boys)
- la niña pequeña → las niñas pequeñas (the small girl → the small girls)
- un coche rojo → unos coches rojos (a red car → some red cars)

Words that change meaning depending on gender (pairs to know)

Some nouns change meaning when their gender changes. These are important to learn because the meaning can flip completely.

- el capital (financial capital) vs la capital (capital city)
- El capital invertido ha aumentado. (The invested capital has increased.)
- Madrid es la capital de España. (Madrid is the capital of Spain.)
- el cometa (a comet) vs la cometa (a kite)
- El cometa pasó cerca de la Tierra. (The comet passed near Earth.)
- Los niños vuelan la cometa en el parque. (The children fly the kite in the park.)
- el cura (a priest) vs la cura (a cure)
- El cura celebra la misa. (The priest celebrates mass.)
- Buscaron la cura para la enfermedad. (They looked for the cure for the disease.)
- el orden (order/tidiness) vs la orden (an order/command)
- Mantén el orden en la mesa. (Keep order at the table.)
- Dio la orden de empezar. (He gave the order to begin.)
- el frente (front — e.g., weather front) vs la frente (forehead)
- El frente frío llegará mañana. (The cold front will arrive tomorrow.)
- Me duele la frente. (My forehead hurts.)

Common mistakes learners make — and how to avoid them

- Relying only on endings. Many exceptions exist; always learn the article with the noun: el mapa, la mano.
- Forgetting agreement. If the noun is plural, change the article and adjective: "las casas blancas", not "las casas blanca".
- Using "la" with feminine nouns that take "el" in the singular: say "el agua fría", not "la agua fría" (but plural is "las aguas frías").
- Confusing words whose gender changes meaning — memorize a few common pairs (capital/capital, cometa/cometa, cura/cura).
- Not checking the dictionary. If unsure about gender or plural form, a dictionary will show the correct article and plural.

Practical study tips and memory tricks

- Always learn nouns with their article: "el libro", "la mesa". The article is your best memory cue for gender.
- Group new words by endings (all -ción words, all -ma words) to form patterns in your mind.
- Pay attention to adjective agreement in real reading: highlight article + noun + adjective sequences.
- When you don’t know the gender of a person or animal and you must refer to them, use the article and then adjectives to clarify: "un estudiante joven" / "una estudiante joven".
- Use a reliable dictionary to confirm unfamiliar words and exceptions.

Quick reference summary (most useful points)

- Gender: common masculine endings: -o, -or, -aje, -ma (Greek); common feminine endings: -a, -ción, -sión, -dad, -tad, -tud, -umbre.
- Exceptions are common: learn the article with the noun.
- Feminine nouns beginning with a stressed "a" use el/un in the singular: el agua fría, un águila grande (adjectives remain feminine).
- Number: vowel endings add -s; consonant endings add -es; -z → -ces; nouns ending in unstressed -s often do not change form in the plural.
- Articles/adjectives/determiners must agree in gender and number.

Glossary (simple definitions)

- Gender (género): a grammatical category that classifies nouns as masculine or feminine.
- Number (número): a grammatical category that distinguishes singular (one) from plural (more than one).
- Article (artículo): words that accompany nouns and show gender/number (el, la, los, las, un, una).
- Agreement (concordancia): the requirement that articles, adjectives and some determiners match the noun in gender and number.

If you keep learning nouns with their articles and pay attention to adjective agreement as you read and listen, gender and number will become automatic over time. When in doubt, check a dictionary or native usage examples.