incautiously

incautious +‎ -ly

incautiously (comparative more incautiously, superlative most incautiously)

1. In an incautious manner; with a lack of caution.
   • 1813, Jane Austen, Pride and Prejudice, Volume II, Chapter 13,

     His behaviour to herself could now have had no tolerable motive; he had either been deceived with regard to her fortune, or had been gratifying his vanity by encouraging the preference which she believed she had most incautiously shewn.

   • 1914, Theodore Roosevelt, Through the Brazilian Wilderness, New York: Charles Scribner’s Sons, Chapter 2, p. 41,

     […] the piranhas habitually attack things much larger than themselves. They will snap a finger off a hand incautiously trailed in the water […]

   • 2008, Jewel L. Spangler, Virginians Reborn: Anglican monopoly, Evangelical dissent, and the rise of the Baptists in the late Eighteenth Century, Charlottesville: University of Virginia Press, Chapter 2, p. 43,

     The parson explained that the dissenters were insufficiently grounded in religious learning, inappropriately eager to administer the sacraments without his help or sanction, and incautiously emotional in their worship.

• cautiously