覆水盆に返らず (ふくすいぼんにかえらず): what's done is done; it is no use crying over spilt milk; spilt water won't go back into its tray
覆水盆に返らず
what's done is done; it is no use crying over spilt milk; spilt water won't go back into its tray
For something irreversible, especially a relationship or a decision that cannot be unmade. Heavier than ordinary regret.
The same saying in Chinese: 覆水难收