1 grave

2 serious

3 severe

4 critical

1 to repeat

2 repetition

3 again

4 re-

5 classifier: layer

1 again

2 once more

3 re-

1 important

2 significant

3 major

1 to take care of oneself

1 each word carries weight

2 a promise must be kept (idiom)

1 lit. not knowing what's important (idiom); no appreciation of the gravity of things

2 naive

3 doesn't know who's who

4 no sense of priorities

1 Five ghosts mock the judge, or Five ghosts resist judgment (title of folk opera, idiom); important personage mobbed by a crowd of ne'er-do-wells

1 as different as heaven and earth (idiom)

2 worlds apart

1 high merit and worthy prospects (idiom)