The Collaborative International Dictionary
Unthinkingness
Unthinking \Un*think"ing\, a.
Not thinking; not heedful; thoughtless; inconsiderate; as, unthinking youth.
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Not indicating thought or reflection; thoughtless.
With earnest eyes, and round unthinking face, He first the snuffbox opened, then the case.
--Pope. [1913 Webster] -- Un*think"ing*ly, adv. -- Un*think"ing*ness, n.
Wiktionary
unthinkingness
n. Quality of being unthinking.
Usage examples of "unthinkingness".
In a fit of unthinkingness - if I may use such an expression, - I gave the floor over the parlour, where the seance was taking place, two loud raps with the hammer.
The doctrine yet lingers by sheer force of prescription and unthinkingness, when the basis on which it originally rested has been dissipated.