(the world of the) red light districts

bitter experience; misery; distress; grief; sad thoughts; hardship

illness; sickness

anxiety; concern; fear

to lament; to grieve; to feel sorrow for

depression; melancholy; dejection; gloom; despondency

alternating between happiness and anxiety; swinging between joy and sorrow; being glad and sad by turns; oscillating between optimism and pessimism

needless fear; groundless apprehension; unfounded worry

patriotic concern for the future of one's country

troubles both at home and abroad

gloom; melancholy