After hours, for good, die down

after hours
일과 후에 (근무시간 후에)

A: What should I do if his condition gets worse after hours?
B: You must take him to the emergency room.

for good
영원히

A: I decided to quit smoking for good.
B: Good luck. This is your third time.

die down
약해지다, 잦아들다

A: I can't stand the heat wave.
B: I hope it dies down soon.