Very bad, awful.
Good, great; "wicked".
Inveterate or habitual.
Of a problem, that continues over an extended period of time.
Prolonged or slow to heal.
Of a person, suffering from an affliction that is prolonged or slow to heal.
Extremely serious.
A condition of extended duration, either continuous or marked by frequent recurrence. Sometimes implies a condition which worsens with each recurrence, though that is not inherent in the term.
Marijuana, typically of high quality.
A person who is chronic, such as a criminal reoffender or a person with chronic disease.
Bad in quality, awful, terrible.
Warning of bad consequences: ill-boding; portentous.
Expressing bad consequences: dreadful; dismal.
Requiring action to prevent bad consequences: urgent, pressing.