An Etymological Dictionary of the German Language/Rahmen
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Rahmen, m., ‘frame, border,’ from MidHG. ram, rame, m. and f., ‘prop. framework, frame for embroidery or weaving,’ OHG. rama, ‘pillar, prop’; comp. Du. roum, ‘frame.’ Allied probably to Goth. hramjan, ‘to crucify,’ lit. ‘to fasten to a pillar or prop’(?) which may, however, be cognate with Gr. κρεμάννυμι. Rahmen, prop. ‘setting,’ is usually connected with OSlov. kroma, f., ‘border.’