1. A state of calm, tranquil rest or relaxation; restful slumber accompanied by peace and tranquility
After a long day of work, he finally found repouso sereno on his bed.
Depois de um longo dia de trabalho, ele finalmente encontrou repouso sereno em sua cama.
2. A quiet, undisturbed period of sleep or relaxation free from worry or disturbance
The medication helped her achieve repouso sereno throughout the night.
O medicamento a ajudou a alcançar repouso sereno durante toda a noite.