1 sad

2 sorrowful

1 tragedy

2 classifier: 出 chū

1 ache

2 pain

3 sorrow

4 deeply

5 thoroughly

1 pain

2 suffering

3 painful

4 classifier: 个 gè

1 to ache

1 lit. doesn't hurt, doesn't tickle (idiom); sth is wrong, but not quite sure what

2 fig. not getting to any matter of substance

3 scratching the surface

4 superficial

5 perfunctory

1 lit. if the rabbit dies, the fox grieves (idiom); fig. to have sympathy with a like-minded person in distress

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

1 to try hard to suppress one's grief (idiom)

1 a thought that causes heartache (idiom)