ester ‘compound produced by combination of an acid and an alcohol with elimination of water’
Lexical development traced from the Tamil root:
G. essigäther < essig ‘vinegar’ + äther ‘ether’ < E. vynagre, vyneygre, vineager < O.F. vinaigre ‘vinegar’ < vin ‘wine’ < Lat. vinum + M.E. eegre, aygre, eiger < O.F. aigre ‘sour, acid; harsh, bitter, rough; eager greedy; lively, active, forceful’ < Vulgar Lat. acrus < Lat. acer ‘keen, sharp, pointed, piercing; acute, ardent, zealous’ < ehs < ak < Tamil akku