This is the 15339th most frequent German word.
ursächlich
Causal; relating to or acting as a cause.
Here, 'ursächlich' is used as an adjective to indicate the cause or reason for the power outage. It attributes responsibility.
Die fehlerhafte Installation war ursächlich für den Stromausfall.
The faulty installation was causative for the power outage.
In this sentence, 'ursächlich' is used as part of a phrase to describe a connection or relationship relating to causes or origins.
Ein ursächlicher Zusammenhang zwischen den beiden Ereignissen konnte nicht nachgewiesen werden.
A causal connection between the two events could not be proven.
Here, 'ursächlich' modifies 'Verbindung' to express that direct causality is absent.