Both Uses

heed
in
Listening - One Writer's Beginnings - Chpt 1
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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.†
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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.†

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)