sag 
/ˈsæg/ verb
sags; sagged; sag·ging /ˈsæg/ verb [no obj] 1 : to bend or hang down in the middle especially because of weight or weakness
▪ The roof is sagging in the middle. ▪ Her cheeks sagged [=drooped] with age. ▪ The shelf sagged [=bowed] under the weight of so many books. ▪ a sagging mattress 2 : to become weaker or fewer
▪ The economy began to sag. ▪ As all our efforts failed, our spirits sagged. ▪ the company's sagging sales
▪ The roof is sagging in the middle. ▪ Her cheeks sagged [=drooped] with age. ▪ The shelf sagged [=bowed] under the weight of so many books. ▪ a sagging mattress
▪ The economy began to sag. ▪ As all our efforts failed, our spirits sagged. ▪ the company's sagging sales
— sag noun, plural sags [count]
▪ a sag in sales
▪ a sag in sales
