All 3 Uses

heed
in
One Writer's Beginnings
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I had the feeling even in my heedless childhood that this was the only book my father as a little boy had had of his own.†
Chpt 1 *

heedless = ignorant or ignoring; or not following advice

standard suffix: The suffix "-less" in heedless means without. This is the same pattern you see in words like fearless, homeless, and endless.
So I saw we were all pretty sick, though a proper horror, on finding out what heedless written words of mine have really said, had to come later, as it has.†
Chpt 1
Passionate, recalcitrant, stubbornly undefeated by failure or hurt or disgrace or bereavement, all the while heedlessly wasting of her gifts, she knows to the last that there is a world that remains out there, a world living and mysterious, and that she is of it.†
Chpt 3

standard suffix: The suffix "-lessly" in heedlessly means in a manner that is without. This is the same pattern you see in words like harmlessly, fearlessly, and remorselessly.

Definitions:

(1) (heed)
pay close attention to; or to do what is suggested -- especially with regard to a warning or other advice
(2) (meaning too rare to warrant focus)