 "mari-", "marei", Old Norse "marr" ″sea″ (Norwegian "mar" ″sea″, Shetland Norn "mar" ″mer, deep water fishing qarea″, Faroese "marrur" ″mud, sludge″, Swedish place name element "mar-", French "mare" ″pool, pond″).They derive from reconstituted Proto-Germanic "*mari", itself from Indo-European "*mori", the same root as "marsh" and "moor".The Indo-European root "*mori" gave also birth to similar words in other European languages