'Unremittingness' definitions:

Definition of 'Unremittingness'

From: GCIDE

Unremitting \Un`re*mit"ting\, a. Not remitting; incessant; continued; persevering; as, unremitting exertions. --Cowper. -- {Un`re*mit"ting*ly}, adv. -- {Un`re*mit"ting*ness}, n. [1913 Webster]