interim
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interim
Carrying out an office or function only temporarily or in an acting capacity until a final arrangement is made.
Nach dem Rücktritt des Direktors leitet sie die Abteilung kommissarisch.
After the director's resignation, she is heading the department on an interim basis.
The word 'kommissarisch' (on an interim basis / acting) is usually used as an adverb. It then describes the way in which a function is carried out, namely temporarily.
Er führt die Geschäfte nur kommissarisch, bis ein Nachfolger gefunden ist.
He is only managing the business on an interim basis until a successor is found.
'Kommissarisch' (interim / acting) is a typical word from administrative and official language. It is often found in official announcements from companies, associations, or political organizations.
Laut der Pressemitteilung wurde ein kommissarischer Vorstand eingesetzt.
According to the press release, an interim board was appointed.
This word is almost always combined with verbs that describe a leadership function, such as 'leiten' (to lead/manage), 'führen' (to lead/run), 'übernehmen' (to take over), or 'einsetzen' (to appoint).
Sie wird die Abteilung kommissarisch übernehmen.
She will take over the department on an interim basis.
final
'endgültig' and 'kommissarisch' are opposites when talking about offices or roles. 'endgültig' means that an arrangement is fixed and final. 'kommissarisch' means that someone takes on a task only temporarily or in an acting capacity until a permanent solution is found. 'kommissarisch' is used especially in work, administration, politics, or clubs and associations. So 'eine kommissarische Leitung' (interim leadership) is precisely not yet a final appointment.
Meine Kollegin übernimmt die Abteilung kommissarisch, bis ein neuer Chef kommt.
My colleague is taking over the department on an interim basis until a new boss arrives.
Nach der Wahl ist die neue Leitung endgültig bestätigt.
After the election, the new leadership is finally confirmed.