Where does “intentiveness” come from?

intentiveness (English) comes from English intentive, from Middle English ententif, from Old French ententif, from Late Latin intentivus, from Latin intendō, from Latin īn-, from Latin în, from Latin en — in.

intentiveness (English): Closeness of attention; attentiveness;...

Definitions

  1. Closeness of attention; attentiveness;...

Ancestry of “intentiveness”, step by step

intentiveness traces back through two separate lines of ancestry.

via English intentive

StepLanguageWordMeaning
1EnglishintentivePaying attention; attentive, heedful; Intent;...
2Middle Englishententif
3Old Frenchententif
4Late Latinintentivusintensive
5Latinintendōto stretch out; to strain
6Latinīn-un-, non-, not
7Latinînin, at, on, upon, from (space)
8Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
9Proto-Italicenin
10Proto-Indo-Europeanh₁énin

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 h₁énEvery word from Latin īn-Every word from Proto-Italic en