You searched for: “ignorance
ignorance (s) (noun), ignorances (pl)
1. A lack of knowledge, education, learning, information, etc.
2. Unawareness of something, often of something important; uninformed.

There is one thing to be said about ignorance—it sure causes a lot of interesting arguments.

—Anonymous
(Greek > Latin > Old French > French: pretended ignorance; saying the opposite of what a person really means)
(ignorance word usage is no excuse for continuing such ignorance)