Collocations for ignorant - adj.

appear, be, feel, seem | remain
The general public remained totally ignorant of the danger.

keep sb
We were kept ignorant of the facts.

completely, entirely, pig (informal), quite, totally, utterly, very, wholly
Don't ask Paul. He's pig ignorant.

largely | rather | blissfully
We went to bed that night blissfully ignorant of the storm to come.

grossly, lamentably, woefully

about
He was completely ignorant about the country's political system.

of
We are still woefully ignorant of the causes of this disease.