"heedless" in the adjective sense
1. heedless, unheeding
marked by or paying little heed or attention we know now that it is bad economics"
"We have always known that heedless self-interest was bad morals
2. heedless, reckless
characterized by careless unconcern
"the heedless generosity and the spasmodic extravagance of persons used to large fortunes"- Edith Wharton
"reckless squandering of public funds"
Source: WordNet® (An amazing lexical database of English)
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