This is the 9647th most frequent German word.
möbeln
To refurbish or beat up.
Here 'möbliert' is derived from 'möbeln', used in the context of furnishing, with the apartment as the object being furnished.
Sie haben die Wohnung neu möbliert.
They have newly furnished the apartment.
In this sentence, 'möbelt' means to refurbish or renovate, indicating the improvement or aesthetic enhancement of an object.
Er möbelt die alte Kommode auf.
He is refurbishing the old dresser.
The verb 'möbliert' signifies furnishing or furnishing anew, correlating the action to the living room as its object.