Examples from the Web for unthoughtful
If the rows on the ears of corn are irregular and broken, the planter is considered careless and unthoughtful.Myths and Legends of the Sioux|Marie L. McLaughlin
Unthoughtful husbands do not always appreciate the magnitude of the duties which fall to the successful homemaker and homekeeper.What a Young Husband Ought to Know|Sylvanus Stall
The unthoughtful took desperately what they believed life owed them.The Kingdom Round the Corner|Coningsby Dawson
Men is so unthoughtful, and seems to think as women can stow themselves away anywheres.One of the 28th|G. A. Henty
It is good for nothing else that I know of; strong, but unhelpful and unthoughtful.
British Dictionary definitions for unthoughtful
Word Origin and History for unthoughtful
c.1200, "contemplative," from thought + -ful. Also in Middle English, "prudent; moody, anxious." Meaning "showing consideration for others" is from 1851 (cf. thoughtless.) Related: Thoughtfully; thoughtfulness.