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 pain

2 suffering

3 painful

4 classifier: 个 gè

1 bitter

2 hardship

3 pain

4 to suffer

5 to bring suffering to

6 painstakingly

1 each word carries weight

2 a promise must be kept (idiom)

1 unable to bear the pain (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 lit. the pain of being hanged upside down (idiom); fig. extremely critical situation

2 dire straits