She didn't want to betray complete ignorance by asking someone.

I have seen all too many student pieces which betray, in every bar, ignorance of how instruments work and what they can do.

He almost spoke the words aloud, but held back in fear of betraying his own ignorance.

But I hesitated to betray my ignorance by pestering everyone else with questions.

He refrained from asking, not wishing to betray his ignorance.

But you betray your own ignorance even as you tempt me.

You claim the language has changed, and betray your ignorance of the abuse and hate we live with daily.

Others made observations which betray such ignorance or prejudice as no scholar would wish to associate himself with.

"I am about to betray my ignorance," she admitted.

"Well, not much," said Clara, wisely unwilling to betray her total ignorance.