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heedlessness
noun
1.
a lack of attentiveness (as to children or helpless people)
inattentiveness
Derived from:
heedless
2.
the trait of acting rashly and without prudence
unprudence
mindlessness
rashness
Derived from:
heedless
3.
the trait of forgetting or ignoring your responsibilities
inadvertence
inadvertency
unmindfulness
Antonym:
heedfulness