Where does “potash alum” come from?

potash alum (English) comes from English potash, from English Ash, from Middle English asshe, from Old English æsc, from Old English æsċ, from Old English trēo, from Proto-West Germanic treu, from Proto-Germanic trewą — hard, firm, strong, solid; hard, fast; tree.

potash alum (English): alum, hydrated potassium aluminium sulphate, formula K2SO4.Al2(SO4)3.24H2O

Definitions

  1. alum, hydrated potassium aluminium sulphate, formula K2SO4.Al2(SO4)3.24H2O

Ancestry of “potash alum”, step by step

potash alum traces back through two separate lines of ancestry.

via English potash

StepLanguageWordMeaning
1EnglishpotashThe water-soluble part of the ash formed by...
2EnglishAshThe Egyptian god of oases
3Middle Englishassheashes; The remnants of a lifeform; The matter...
4Old Englishæscash tree; spear; ship
5Old Englishæsċash tree; ash, spear, lance, ship
6Old Englishtrēo
7Proto-West Germanictreutree; wood
8Proto-Germanictrewątree
9EnglishdoruAlternative form of dory
10Ancient Greekδόρυwood, tree, stem; spear shaft, spear, lance,...
11Proto-Hellenicdórutree
12Proto-Indo-Europeandórutree
13Proto-Indo-Europeandrew-hard, firm, strong, solid; hard, fast; tree

via English alum

StepLanguageWordMeaning
1EnglishalumAn astringent salt, usually occurring in the form...
2EnglishalumnusA male pupil or student; A male graduate; A...
3LatinalumnusNourished, fostered, etc; Nursling, pupil; foster...
4Proto-Italicalomanos
5Proto-Indo-Europeanh₂el-o-mh₁no-being nourished
6Proto-Indo-Europeanh₂el-to grow, nourish; beyond, other; to wander, roam
Every word from Proto-Indo-European drew-