Proto-Germanic: *sirwēn- vb.
Meaning: become dry
Old High German: serawēn `trocken werden, tabescere, languere, marcere'
Middle High German: sërwen, sërben wk. 'innerlich abnehmen, entkräftet werden, dahinwelken, kränkeln, absterben'
German: { serben `verdorren, welk werden' }