Re-gärd’less, a.
a. 1. Not looking or attending; heedless; negligent; careless; as, regardless of life or of health; regardless of danger; regardless of consequences.
Regardless of the bliss wherein he sat. Milton.
Sense 2. Not regarded; slighted. [Rare.] Spectator.
Synonyms— Heedless; negligent; careless; indifferent; unconcerned; inattentive; unobservant; neglectful.