to work continuously day and night
travailler sans relâche jour et nuit (travailler sans relache jour et nuit)
"They worked around the clock to finish the project."
"Ils ont travaillé sans relâche pour terminer le projet." (Ils ont travaille sans relache pour terminer le projet.)
to remain calm in difficult or stressful situations
feeling calm and accepting of oneself
to be unable to act freely because of rules or restrictions
to protect your calm and avoid stress or disturbance
having no money at all
to treat someone fairly and with respect