unadvised

It was painfully clear that Sister Irma herself had found the color unsatisfactory and had tried her unadvised, noble best to tone it down somehow.

From "Nine Stories" by J. D. Salinger

To send abroad a Book, among such Readers, were a very unadvised thing, if a Man had not such Reasons to give, as I can bring, for such an Undertaking.

From The Wonders of the Invisible World Being an Account of the Tryals of Several Witches Lately Executed in New-England, to which is added A Farther Account of the Tryals of the New-England Witches by Cotton Mather

Sirs! one and all, I counsel you, beware Of such bold boasting unadvised; lest one O’erhearing you, report your words within.

From The Odyssey of Homer by William Cowper

The young lancers with eager gaze, fevered face, burst impatiently forward, but advised or unadvised they still needed to obey the strict orders of the commander, who still repeated: “Trot! forward! trot!”

From My First Battle A Sergeant's Story by Jimmy O'Regan

Exhausted and unadvised, most of the men sought refuge from the fearful cold by crawling unbrushed into their frozen sleeping-bags, without even removing their boots let alone their socks.

From True Tales of Arctic Heroism in the New World by Adolphus W. Greely