Wiktionary
unthoughtful
a. 1 inconsiderate of other's feelings 2 unplanned or unthinking
WordNet
unthoughtful
adj. not exhibiting or characterized by careful thought [syn: unreflective, unthinking]
Usage examples of "unthoughtful".
It was an unthoughtful act in a man who has so often slept with the war-whoop ringing in the air, to let off his piece within sound of an ambushment!
The Germans came and were obnoxious and unthoughtful, as adolescents tend to be, and stole the tree from me.
Unmoved by the forbidding grimness of the mountains, unthoughtful of their solemn warning, he took his place as much a part of the lonely scene as the hills themselves.