let·up 
/ˈlɛtˌʌp/ noun
/ˈlɛtˌʌp/ noun : a time during which something stops or slows down [noncount] ▪ It rained three days without letup. [=it rained continuously for three days] ▪ We worked without letup. [=we worked continuously] [singular] ▪ There's been a letup [=break] in the fighting. — see also let up at 1let
