Noun
mercilessness characterized by an unwillingness to relent or let up
Source: WordNetthe relentlessness or their pursuit Source: Internet
Arafat’s war of terror (the so called “al-Aqsa Intifada”) was unparalleled in the scale and relentlessness of its terrorist attacks on Israeli civilians. Source: Internet
It’s a huge factor in their relentlessness and whether a top attacking performance or a game where they grind out the result, somehow Klopp’s team keep finding a way. Source: Internet
Why, however, this relentlessness to muddy the waters and to seek some kind of origin for mankind through anthropological-archaeological and other elucubrations? Source: Internet