Where does “ignorantness” come from?

ignorantness (English) comes from English ignorant, from Old French ignorant, from Latin ignōrāns, from Latin ignōrō, from Proto-Indo-European ǵneh₃- — to know.

ignorantness (English): The state or quality of being ignorant; ignorance

Definitions

  1. The state or quality of being ignorant; ignorance

Ancestry of “ignorantness”, step by step

ignorantness traces back through two separate lines of ancestry.

via English ignorant

StepLanguageWordMeaning
1EnglishignorantUnknowledgeable or uneducated; characterized by...
2Old Frenchignorant
3Latinignōrānsunknowing, being ignorant of
4Latinignōrōto not know; to be unacquainted with; to be ignorant of
5Proto-Indo-Europeanǵneh₃-to know

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European ǵneh₃-