Where does “unsinkableness” come from?

unsinkableness (English) comes from English unsinkable, from English sink, from German zink, from Middle High German zinke, from Old High German zinko, from Proto-Germanic tindaz, from Proto-Indo-European h₃dónts, from Proto-Indo-European h₁ed- — to eat.

unsinkableness (English): The quality of being unsinkable

Definitions

  1. The quality of being unsinkable

Ancestry of “unsinkableness”, step by step

unsinkableness traces back through two separate lines of ancestry.

via English unsinkable

StepLanguageWordMeaning
1EnglishunsinkableOf a ship: that cannot be sunk; That cannot be...
2Englishsink"To move or be moved into something."; "To...
3Germanzinksingular imperative of zinken; first-person...
4Middle High Germanzinketine, prong
5Old High Germanzinko
6Proto-Germanictindaztooth; cog; peg; tine; nail; spike; prong; peak;...
7Proto-Indo-Europeanh₃dóntstooth
8Proto-Indo-Europeanh₁ed-to eat

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 h₁ed-Every word from Proto-Indo-European h₃dóntsEvery word from Proto-Germanic tindaz