This is the 15662nd most frequent German word.
zeitaufwendigen
Time-consuming.
Here, 'zeitaufwendig' is used to express that repairing the car took considerable time.
Die Reparatur des Autos erwies sich als zeitaufwendig.
The car repairs turned out to be time-consuming.
Here, 'zeitaufwendige' describes the nature of the research as demanding a significant amount of time.
Das Projekt erforderte eine zeitaufwendige Recherche.
The project required time-consuming research.
In this example, 'zeitaufwendige' characterizes the processes as requiring substantial time investment.