Ignorance
Definition 1 of 3
Pro Tip 1/3
Positive usage
Sometimes used neutrally to indicate someone simply doesn't know something yet. Don't worry about your ignorance of English slang, you'll learn it in time.
Pro Tip 2/3
Collocation caution
Combining 'ignorance' with different prepositions changes its implied meaning. His ignorance of the law was amusing, but ignorance about the law can be dangerous.
Pro Tip 3/3
Non-judgmental
'Ignorance' doesn't always mean someone is at fault for not knowing. Children's ignorance of world events is expected due to their age.