Adjective Declension in German

Adjective declension (die Adjektivdeklination) is one of the most complex topics in German grammar. When an adjective is placed directly before a noun to describe it, it must receive a specific ending. This ending is determined by three variables: the noun's grammatical gender (masculine, feminine, or neuter), its grammatical number (singular or plural), its grammatical case (nominative, accusative, dative, or genitive), and the type of article that precedes the adjective.

There are three types of adjective declension. Weak declension is used after definite articles ('der', 'die', 'das'), where the article already clearly shows the case, so the adjective takes a simple '-e' or '-en' ending. Strong declension is used when there is no article before the adjective, requiring the adjective to take the case ending itself to show the grammatical information. Mixed declension occurs after indefinite articles ('ein', 'eine') and possessive articles, combining elements of both weak and strong declension.

Mastering these endings requires studying declining charts and practicing. Adjectives that appear after the noun (predicative adjectives, e.g., 'Das Buch ist gut') do not decline at all and keep their basic form. However, whenever an adjective sits directly before a noun, using the correct declension ending is necessary for grammatically correct sentences.