Where does “fenniness” come from?

fenniness (English) comes from English fenny, from Middle English fenny, from Old English fenniġ, from Old English fenn, from Old English tūn, from Proto-West Germanic tūn, from Proto-Germanic tūną, from Gaulish dunum — smoke; mist, haze.

fenniness (English): The state or condition of being fenny

Definitions

  1. The state or condition of being fenny

Ancestry of “fenniness”, step by step

fenniness traces back through two separate lines of ancestry.

via English fenny

StepLanguageWordMeaning
1EnglishfennyCharacteristic of a fen; marshy, swampy; Living...
2Middle Englishfennyfenny, marshy; like a fen; rotten, tainted,...
3Old Englishfenniġfenny
4Old Englishfennmud; fen, marsh
5Old Englishtūnenclosure, yard; place; dwelling
6Proto-West Germanictūnfence
7Proto-Germanictūnąfence; enclosure
8Gaulishdunumfort; hill, hillfort
9Proto-Celticdūnomstronghold, rampart
10Proto-Indo-Europeandʰewh₂-smoke; mist, haze

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 dʰewh₂-Every word from Proto-Celtic dūnomEvery word from Gaulish dunum