1 (negative prefix)

2 not

3 no

1 not long (after)

2 before too long

3 soon

4 soon after

1 not only (... but also...)

1 not only (this one)

2 not just (...) but also

1 unfavorable

2 disadvantageous

3 harmful

4 detrimental

1 don't do it, or don't rest (idiom); either give up, or go through to the end

2 Since we started, we must carry it through whatever happens.

3 in for a penny, in for a pound

1 lit. to reply "don't know" whatever the question (idiom)

2 fig. absolutely no idea of what's going on

3 complete ignorance

1 untainted by even a speck of dust (idiom); selfless and incorruptible

2 spotless

1 a single slip may cause everlasting sorrow (idiom)

1 to not mention a single word (about sth) (idiom)