Definitions

1. 1. bitter and hateful (idiom)
2. 2. to grieve and lament (over sth)
3. 3. heartache and headache
4. 4. feel awful
5. 5. deep regret for one’s own deeds

Components

• 痛心 tòng xīn – grieved
• 疾首 jí shǒu – extremely angry