澳

abbr. for Macao 澳門|澳门 / abbr. for Australia 澳大利亞|澳大利亚

deep bay / cove / harbor

Austria / Austrian / abbr. for 奧地利|奥地利[Ao4 di4 li4] / Olympic / Olympics / abbr. for 奧林匹克|奥林匹克[Ao4 lin2 pi3 ke4]

obscure / mysterious

"water" radical in Chinese characters (Kangxi radical 85), occurring in 沒|没[mei2], 法[fa3], 流[liu2] etc / see also 三點水|三点水[san1 dian3 shui3]