1 old variant of 深[shēn]

1 grave

2 serious

3 severe

4 critical

1 Shenzhen subprovincial city in Guangdong, special economic zone close to Hong Kong

1 to repeat

2 repetition

3 again

4 re-

5 classifier: layer

1 again

2 once more

3 re-

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 to talk intimately while being comparative strangers (idiom)

1 untold pain and suffering (idiom); deeply scarred for life

1 high merit and worthy prospects (idiom)