Where does “phaticness” come from?

phaticness (English) comes from English phatic, from Ancient Greek φατός, from Ancient Greek φημί, from Proto-Hellenic pʰā́mā, from Proto-Indo-European bʰeh₂-meh₂, from Proto-Indo-European bʰeh₂-, from Proto-Indo-European bʰeh₂-s-ri-.

Ancestry of “phaticness”, step by step

phaticness traces back through two separate lines of ancestry.

via English phatic

StepLanguageWordMeaning
1EnglishphaticPertaining to words used to convey any kind of...
2Ancient Greekφατόςspoken; slain, dead
3Ancient GreekφημίI speak, say; I say yes, agree, affirm, assert
4Proto-Hellenicpʰā́mā
5Proto-Indo-Europeanbʰeh₂-meh₂
6Proto-Indo-Europeanbʰeh₂-to shine, glow light; to speak, say
7Proto-Indo-Europeanbʰeh₂-s-ri-

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 bʰeh₂-s-ri-Every word from Proto-Indo-European bʰeh₂-Every word from Proto-Indo-European bʰeh₂-meh₂