The Collaborative International Dictionary
Regardlessness
Regardless \Re*gard"less\, a.
-
Having no regard; heedless; careless; as, regardless of life, consequences, dignity.
Regardless of the bliss wherein he sat.
--Milton. -
Not regarded; slighted. [R.]
--Spectator.Syn: Heedless; negligent; careless; indifferent; unconcerned; inattentive; unobservant; neglectful. [1913 Webster] -- Re*gard"less*ly, adv. -- Re*gard"less*ness, n.
Wiktionary
regardlessness
n. Lack of regard; heedlessness.