An Etymological Dictionary of the German Language/Annotated/Rinde
Rinde, feminine, ‘rind, crust, bark,’ from Middle High German rinde, Old High German rinta, feminine, ‘rind of trees, crust,’ also (rarely) ‘bread-crust’; corresponding to Anglo-Saxon rind, English rind. Its kinship with Rand and Ramst is undoubted; their common root seems to be rem, ram, ‘to cease, end’; compare especially Anglo-Saxon reoma, rima, English rim. Some etymologists connect it with Gothic rimis, ‘repose’; compare Sanscrit ram, ‘to cease, rest.’