— In Portuguese, nouns (words for people, places, things, and ideas) have a gender—they can be masculine or feminine. Here’s a simple way to know which one to use: 1. Words ending in “-o” are usually masculine. For example, "livro" (book) and "carro" (car) are masculine. 2. Words ending in “-a” are usually feminine. For example, "casa" (house) and "mesa" (table) are feminine. 3. Exceptions: Some words don't follow this rule, like "mão" (hand, feminine) or "dia" (day, masculine). These need to be memorized. When describing people, the endings usually change based on gender: - Masculine: "amigo" (male friend) - Feminine: "amiga" (female friend) Adjectives also change to match the gender of the noun: - "gato preto" (black cat, masculine) - "gata preta" (black cat, feminine) In summary, -o for masculine and -a for feminine is a good rule, but there are exceptions to learn over time!