Noun
The quality of being inexorable, or unyielding to entreaty.
Source: Webster's dictionaryBut capitalist production begets,with the inexorability of a law of Nature,its own negation. It is the negation of negation. Karl Marx
As with all great works of literature, 'Of Mice and Men' moves with the inexorability of a huge river, and it pours itself, exhausts itself, in the sea of our unconscious. Having read it, we carry the book inside us forever. Jay Parini
the relentlessness or their pursuit Source: Internet