sérieux

sérieux [seʀjø, -øz] adj → serious; [élève, employé] → reliable, responsible; [client, maison] → reliable, dependable; [offre, proposition] → genuine, serious (= grave, sévère); serious, solemn; [maladie, situation] → serious, grave (= important); considerable

nm → seriousness; reliability;

ce n'est pas sérieux (= raisonnable) → that's not on;

garder son sérieux → to keep a straight face;

manquer de sérieux → not to be very responsible (ou reliable);

prendre qch/qn au sérieux → to take sth/sb seriously