To put into practice; to carry out; to put into effect.

Literally meaning to cast something into the eastward-flowing waters; used to describe hopes that have come to nothing or efforts that have been completely wasted.

to commit something to the flames; to burn down; to destroy by fire

Literally "to cast to the flowing waters"; used to describe efforts that have been wasted or hopes that have come to nothing; same as [[付之东流|付之東流|fu4 zhi1 dong1 liu2]]