"cautious, wary," 1540s, from heed (n.) + -ful.
heedful of what they were doing
heedful of the warnings
so heedful a writer
heedful of his father's advice
hedonist
hedonistic
Hedwig
heebie-jeebies
heed
heedful
heedless
hee-haw
heel
heeled
heeler
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