An adjective is a word that describes a noun: its shape, color size, etc. Spanish adjectives are very different from English adjectives, for two reasons.
Cuyo is a relative adjective that means “whose,” “of whom,” or “of which.” It indicates the noun which is the object of the clause that follows it.
The Spanish definite article has to agree in gender and number with the noun it modifies, and it doesn’t always correspond to an article in other languages.
Demonstrative pronouns (this one, that one, the one[s], these, those) refer to a previously-mentioned noun in a sentence. Spanish demonstrative pronouns are more complicated than their English counterparts, because there are three different sets and because they must agree in gender and number with the noun they replace.
In Spanish, suffixes called diminutives can be added to nouns, adjectives, adverbs, and names to indicate smallness, as well as other ideas such as affection, humor, pity, irony, or ridicule. In this way, you can say that something is little without adding an adjective like pequeño to indicate smallness or querido to indicate affection.
The Spanish relative pronoun el cual usually means “who” or “whom” and has four different forms.
The singular indefinite articles in Spanish correspond to “a, an, one” in English. The plurals correspond to “some.” There are four Spanish indefinite articles.
Qué, cuál, and cuánto are Spanish interrogative adjectives. An adjective is a word that modifies a noun, and interrogative means questioning, so interrogative adjectives are adjectives used to ask the questions "what," "which," and how "much/many."
Making nouns plural in Spanish is slightly more complicated than in English, but it’s not too bad.
Possessive adjectives are the words used in place of articles to indicate to whom or to what something belongs. Their usage is similar to English, but there are some differences in form.