Douglas Harper's Etymology Dictionary
misinformed
mid-15c., past participle adjective from misinform.
Wiktionary
misinformed
vb. (en-past of: misinform)
Usage examples of "misinformed".
I had been misinformed, or you should have had no occasion to think me rude.
Buchan blithely misinformed reporters in the gymnasium of Crawford Middle School, which served as the press filing center.
Their warm bodies misinformed any heat-sensing devices swept over the fields by occasional flying troops, as well.
I doubt the American public is ready for a blood-drinking Casanova to triumph over the well-intentioned, if slightly misinformed, Dr.