to be very clear about sth (idiom)

pain; anguish; suffering

surname Chu; abbr. for Hubei 湖北省[Hu2 bei3 Sheng3] and Hunan 湖南省[Hu2 nan2 Sheng3] provinces together; Chinese kingdom during the Spring and Autumn and Warring States Periods (722–221 BC)

distinct; clear; orderly; pain; suffering; deciduous bush used in Chinese medicine (genus Vitex); punishment cane (old)

suffering; misery; pain (esp. psychological)