Nouns: Los sustantivos
Every noun in Spanish has a gender, either masculine(m) or feminine(f).

Generally, words that name male people or animals are masculine, and those that name female people or animals are feminine, but there are exceptions. Words that name objects, places, events, etc. are also identified as masuline of feminine.

The gender of a noun is indicated by the article that precedes it:

el (indicates a masuline noun)
la (indicates a feminine noun)

Try to learn the nouns with their articles as if they were one.