Merriam-Webster's Collegiate® Dictionary, 11th Edition
SORROW
I. noun
Etymology: Middle English sorow, from Old English sorg; akin to Old High German sorga sorrow Date: before 12th century
1. deep distress, sadness, or regret especially for the loss of someone or something loved, resultant unhappy or unpleasant state , a cause of grief or sadness, a display of grief or sadness, Synonyms: see: sorrow
II. intransitive verb Date: before 12th century to feel or express sorrow, sorrower noun