Where does “insightfulness” come from?

insightfulness (English) comes from English insightful, from English insight, from Middle English insight, from Old English insiht, from Proto-Germanic insahtiz, from Proto-Germanic in, from Proto-Indo-European én — in.

insightfulness (English): The state or condition of being insightful

Definitions

  1. The state or condition of being insightful

Ancestry of “insightfulness”, step by step

insightfulness traces back through two separate lines of ancestry.

via English insightful

StepLanguageWordMeaning
1EnglishinsightfulPossessing insight
2EnglishinsightA sight or view of the interior of anything; a...
3Middle Englishinsight
4Old Englishinsihtnarrative, account; argument
5Proto-Germanicinsahtizaccount, narrative; discussion, argument
6Proto-Germanicinin; into
7Proto-Indo-Europeanénin

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 énEvery word from Proto-Germanic inEvery word from Proto-Germanic insahtiz