do away with
To put an end to; stop.
The teachers want to do away with cheating in their school.
The city has decided to do away with overhead wires.
It may never be possible to do away with all forms of prejudice and discrimination in the world.
To kill; murder.
The robbers did away with their victims.
eat away at
To psychologically gnaw at; to worry someone.
Fear of the comprehensive examination was eating away at Sam.
To rot, rust, or destroy.
Rust was eating away the pipe.
Cancer ate away the healthy flesh.
To gradually consume.
The ocean waves were gradually eating the volcanic rocks away until they turned into black sand.
To withdraw or retreat gradually.
Frightened by the growling tiger guarding its catch, the hunter carefully edged away.
To explain (something) so that it does not seem true or important.
John explained away his unfinished homework by showing the teacher his broken arm in a cast.
It is hard to explain away Abraham Lincoln's dream about being dead, which he had a few days before he was shot.
The man could not explain away the gun and the marked money from the bank robbery that the police found in his car.
To diminish gradually in time or distance.
The memory of that unpleasant experience has slowly faded away.
The music of the band gradually faded away as the parade passed down the street.
To decline; diminish.
I was shocked to see how haggard Alan looked; he seems to be falling away to a shadow.
far and away
The fish was far and away the biggest ever caught on the lake.