Significant (strong) endings

Significant or "strong" adjective endings correspond to those of the der-word noun modifiers. These endings indicate the gender and case of the noun the adjective modifies.

Masculine Feminine Neuter Plural

Nominative
Accusative
Dative
Genitive -er
-en
-em
-en -e
-e
-er
-er -es
-es
-em
-en -e
-e
-en
-er

	Masculine	Feminine	Neuter	Plural
Nominative Accusative Dative Genitive	-er -en -em -en	-e -e -er -er	-es -es -em -en	-e -e -en -er

For the genitive masculine and neuter, the adjective ending is -en rather than -es, because the noun carries a "strong" ending.