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Definition 2024

unheediness ‎(uncountable)

(obsolete) Heedlessness.
- 1603, John Florio, translating Michel de Montaigne, Essayes, London: Edward Blount, OCLC 946730821, II.15:
  And if you chance to be a looser, your owne friends are readier to accuse your improvidence and unhedinesse than to moane you, and excuse your ignorance and carelesenesse concerning the offices belonging to your profession.