Not reasoned or considered; rash: an unconsidered remark. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "unconsidered" in a sentence
"His kind of unconsidered advice leads to a lot of sadness."
"But fate is a cunning hussy, and builds up her plans as imperceptibly as a bird builds her nest; and with much the same kind of unconsidered trifles. '"
"Prompted by closeness to the families of the dead -- wanting as they would to have their murdered loved ones cleared of all blame -- an indefatigable Derryman, Don Mullan, collected and published in 1997 an extraordinary tranche of previously unconsidered eyewitness testimony."