gemeinschaftlichem
Gemeinschaftlichem is the dative singular inflected form of the German adjective gemeinschaftlich, which means communal or shared by a community. In German grammar, adjectives are declined to reflect case, number, gender, and the presence or absence of a determiner. The ending -em in gemeinschaftlichem appears in the dative singular when the noun is introduced without a strong determiner, as in phrases used with prepositions that require the dative case.
Common contexts for this form are technical or formal, such as discussions of property, resources, or activities
Examples of usage include phrases like mit gemeinschaftlichem Eigentum (with communal property) and mit gemeinschaftlichem Engagement
Etymology: gemeinschaftlich derives from Gemeinschaft (community) plus the suffix -lich to form an adjective meaning “relating
See also: Gemeinschaft, Kollektiv, Genossenschaft, gemeinschaftliche Nutzung.