1 clear

2 distinct

3 to understand thoroughly

4 to be clear about

1 ache

2 pain

3 sorrow

4 deeply

5 thoroughly

1 pain

2 suffering

3 painful

4 classifier: 个 gè

1 to ache

1 pain (from wound)

2 sorrow

1 to be very clear about sth (idiom)

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

1 lit. head in Wu and tail in Chu (idiom); fig. close together

2 head-to-tail

3 one thing starts where the other leaves off

1 lit. on all sides, the songs of Chu (idiom)

2 fig. surrounded by enemies, isolated and without help