Webster’s Revised Unabridged Dictionary · 1913
Heedless
Heed′less, a. Without heed or care; inattentive; careless; thoughtless; unobservant.
O, negligent and heedless discipline! Shak.
The heedless lover does not know Whose eyes they are that wound him so. Waller.
— Heed′less·ly, adv. — Heed′less·ness, n.