An Etymological Dictionary of the German Language/Annotated/tilgen
Appearance
tilgen, verb, ‘to extinguish, erase, eradicate,’ from Middle High German tîlgen (tîligen), Old High German tîligon, and also tîlôn, weak verb, ‘to exterminate, extirpate.’ Compare Old Saxon far-dîligôn, Dutch delgen, Anglo-Saxon â-dîlgian, ‘to extirpate.’ It is remarkable that the word was borrowed from Latin dêlêre, considering its wide diffusion in the West Teutonic languages (we should also have expected *tialên in Old High German).