This is the 13987th most frequent Turkish word.
merhametsizliğe
"Mercilessness" or "lack of compassion."
In this sentence, 'merhametsizliğe' is the dative form of 'merhametsizlik', meaning 'to mercilessness', used as the goal against which action is directed.
Merhametsizliğe karşı durmalıyız.
We must stand against mercilessness.
Here, 'merhametsizliğe' expresses the indirect object of the verb 'maruz kalmak', indicating 'being subjected to mercilessness'.
Bir arkadaşının merhametsizliğe nasıl maruz kalabileceğini anlamıyorum.
I cannot understand how a friend can be subjected to mercilessness.
'Merhametsizliğe' in this sentence refers to the indirect object of 'boyun eğmek', denoting 'succumbing to mercilessness'.