n.mercilessness characterized by an unwillingness to relent or let up
"the relentlessness or their pursuit"
同义词：inexorabilityinexorableness
Relentlessness
Relentlessness
Relentlessness Personified
[Therapeutic relentlessness]
Yarborough's relentlessness pays off along Navy defensive line
[Abandonment, therapeutic relentlessness or euthanasia]
Jim Harrison's Novellas Full of Urgency, Relentlessness
[Very premature infants and medical relentlessness: the Anglican Church does not say no anymore]
Engaging High-Risk Young Mothers into Effective Programming: The Importance of Relationships and Relentlessness.
Why Mexico Just Can't Get Ahead Analysts Say Country Lacks a Sense of Purpose and Is Torn by Seeming Relentlessness of Drug War
