Summary: な-adjectives are a type of adjective in Japanese that describe nouns and are different from い-adjectives. They use the particle な to connect to nouns and can also function as nouns themselves. Unlike い-adjectives, な-adjectives do not change form for tense and use specific forms to indicate past or negative meanings.
When a な-adjective comes at the end of a sentence (or more specifically, in the predicate of a clause), it describes the subject of the sentence. (View Highlight)
In this case, the な-adjective still describes the subject, you just have to figure out what that subject is. (View Highlight)
When a な-adjective is used directly before a noun, you need to use な directly after the adjective. な is what attaches the adjective to the noun, forming a short noun phrase. (View Highlight)
In addition to their ability to describe nouns, some な-adjectives can be used as nouns themselves (View Highlight)
These nouns refer to abstract concepts, like “safety” (安全), “peace” (平和), or “freedom” (自由). (View Highlight)
If you’re not sure whether an adjective is an い-adjective or な-adjective, check how it’s written in kanji. Unlike い-adjectives, the final 〜い of these な-adjectives is not in hiragana. (View Highlight)