HEEDLESS
heedless, reckless
(adjective) characterized by careless unconcern; “the heedless generosity and the spasmodic extravagance of persons used to large fortunes”- Edith Wharton; “reckless squandering of public funds”
heedless, unheeding
(adjective) marked by or paying little heed or attention; “We have always known that heedless self-interest was bad morals; we know now that it is bad economics”--Franklin D. Roosevelt; “heedless of danger”; “heedless of the child’s crying”
Source: WordNet® 3.1
Etymology
Adjective
heedless (comparative more heedless, superlative most heedless)
Unaware, without noticing; inattentive; careless.
Antonym: heedful
Source: Wiktionary
Heed"less, a.
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition