1 to renounce

2 to abandon

3 to give up

1 to discard

2 to abandon

1 to spurn

2 to disdain

1 to avoid sb (out of dislike)

2 to turn one's back on sb

3 to ignore

1 to discard

2 to abandon (old ways)

3 to invalidate

1 to stand by (sb) (idiom)

2 steadfast loyalty

1 chance remarks can lead to public execution (idiom)

1 to waste all one's previous efforts (idiom)

2 all that has been achieved goes down the drain

1 to toss away like a pair of worn-out shoes (idiom)

1 to renounce evil and turn to virtue (idiom)