Definitions for wash away
"wash away all the differences"
wash, wash out, wash off, wash away(verb)
remove by the application of water or other liquid and soap or some other cleaning agent
"he washed the dirt from his coat"; "The nurse washed away the blood"; "Can you wash away the spots on the windows?"; "he managed to wash out the stains"
Kernerman English Learner's Dictionary
wash away(verb)ɒʃ, wɔʃ
(of flowing water) to destroy
The structure was washed away in the storm.
To eliminate, or destroy by fast moving water, such as in a flood, or a high sea.
To eliminate, in a figurative sense.