zusätzlichem

Zusätzlich is a German adjective meaning "additional" or "extra." The form zusätzlichem is its dative singular ending used before a masculine or neuter noun when the adjective is declined without a determiner (strong declension). In other contexts, such as after definite or indefinite articles, the ending changes according to the declension pattern.

In common usage, zusätzlichem appears in phrases governed by a dative preposition, where no article is present. For example: mit zusätzlichem Aufwand (with additional effort), von zusätzlichem Geld (from additional money), bei zusätzlichem Personal (with extra staff). These examples illustrate how the form allein signals a dative relation and a masculine or neuter noun. The exact ending can differ if the noun’s gender or the presence of an article changes the declension pattern.

Etymology and meaning: zusätzlich derives from the noun Zusatz (addition, supplement) plus the suffix -lich, forming the core adjective meaning "additional." It is closely related to Zusatz and is often used to describe quantities, resources, or features that go beyond a baseline amount.

Usage notes: zusätzlichem is specifically the dative singular form used in strong declension before masculine or neuter nouns. When the sentence requires a different case or gender, other endings apply (for example, the nominative or accusative forms in other declensions). In many contexts, Zusatzliches oder zusätzliches can also appear in different inflected forms depending on case, gender, and determiner.

See also: Zusatz, zusätzlich, Zusatzkosten, Zusatznutzen.