The adjective is also called a characteristic word or epithet. It usually describes a characteristic of a person, an animal or an object. In the German language, an adjective comes before a noun. A noun is also called a noun or noun. In Latin languages, the adjective usually comes after the noun.
The adjective thus describes the noun more closely. That is why it changes accordingly: it indicates the same gender and number as the noun. You can also say: the adjective "funny" adapts to the noun: "a funny film". Like the noun, the adjective is in the singular and in the masculine form. You can also look for opposites: clean - dirty, light - dark, wet - dry and so on. However, you can hardly find opposites for many adjectives. Examples are grey, golden, mediocre and others.
From the adjective, one can form intensified forms: This is a "long" film, that is an even "longer" film, but the third is the "longest" film.
It is quite difficult to distinguish between an adjective and an adverb. It depends on how and where it is in the sentence. In the sentence "I got a droll dog", "droll" is an adjective because it belongs to the noun "dog". But if you say, "The dog plays drolly", then "drolly" is an adverb because it belongs to the verb "plays". Because this distinction is so difficult, it is usually not made at all in the first years of school, but both are called adjectives. This can be both an adjective and an adverb.