Where does “fatlessness” come from?

fatlessness (English) comes from English fatless, from English fat, from French fat, from Old Occitan fat, from Latin fatuus, from Latin fātus, from Latin for, from Proto-Italic fāōr — to speak, to be talking.

fatlessness (English): Absence of fat

Definitions

  1. Absence of fat

Ancestry of “fatlessness”, step by step

fatlessness traces back through two separate lines of ancestry.

via English fatless

StepLanguageWordMeaning
1EnglishfatlessWithout fat, especially in the senses: "made...
2EnglishfatCarrying more fat than usual on one's body;...
3Frenchfatconceited
4Old Occitanfat
5Latinfatuusfoolish, silly, simple; stupid; insipid,...
6Latinfātusspoken, said, told, foretold, related, predicted; having or had spoken, etc
7Latinfor"defective"; I speak, talk, say
8Proto-Italicfāōrspeak
9Proto-Indo-Europeanbʰéh₂tito speak, to be talking

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 bʰéh₂ti