unmittelbar

In a sentence

• Die unmittelbare Nähe des Parks macht diese Wohnung sehr attraktiv.

  The immediate proximity of the park makes this apartment very attractive.

  Here, 'unmittelbar' is used as an adjective to describe the 'Nähe' (proximity), indicating that the closeness is direct or without anything in between.

• Nach dem Unfall begann die Polizei unmittelbar mit den Ermittlungen.

  After the accident, the police started the investigations immediately.

  In this sentence, 'unmittelbar' functions as an adverb that describes the manner in which the police started their investigation — without delay.

• Die Wirkung des Medikaments war unmittelbar sichtbar.

  The effect of the medication was immediately visible.

  Here, 'unmittelbar' is again used as an adjective to describe 'sichtbar' (visible), emphasizing that there was no time gap between taking the medication and observing its effect.