1 base

2 mean

3 despicable

1 vile

2 nasty

3 of very poor quality

1 to wash out

2 elimination (by selection)

3 natural selection

4 to knock out (in a competition)

5 to die out

6 to phase out

1 inferior

1 inferior

2 disadvantaged

1 survival of the fittest (idiom)

1 local bosses, shady gentry (idiom); dominant local mafia

1 out with the old and in with the new (idiom)