Superlative adjectives in Slovenian grammar are used to express the highest degree of a quality. They are formed by adding the suffix « -ji » or « -naj » to the stem. The stem is the first part of the adjective without the « -en » ending. For example, the superlative form of « velik » (big) is « najveliki » (the biggest). It’s important to note that in Slovenian, the superlative always includes the definite article, producing a translation equivalent to « the most/biggest » in English.