This is the 15006th most frequent German word.
schwieriges
"Difficult" or "challenging."
Here, 'schwieriges' is an adjective describing the noun 'Problem'.
Das ist ein ziemlich schwieriges Problem zu lösen.
That is quite a difficult problem to solve.
In this context, 'schwieriges' describes the noun 'Verhältnis', indicating complexity or tension in the relationship.
Er hat ein schwieriges Verhältnis zu seinen Kollegen.
He has a difficult relationship with his colleagues.
The word 'schwieriges' modifies the noun 'Jahr', reflecting challenges or hardships experienced during the year.