みずのあわ
みずのあわ 【水の泡 】1 【水が作る泡 】(⇨泡 )2 【むだなこと 】▸ これまでの努力がすべて水の泡になった All my efforts came to nothing [were wasted, were in vain , ⦅話 ⦆ went down the drain ].