letup

[ let-uhp ]

/ ˈlɛtˌʌp /

cessation; pause; relief.

Origin of letup

1835–45, Americanism; noun use of verb phrase let up

Then continue to stir in the same direction without an instant's letup, for maybe ten minutes or more, until the Rabbit is smooth.

The Complete Book of Cheese |Robert Carlton Brown
There is no letup until the bright sun drives vice blinking and blinded back into its holes.

The Vice Bondage of a Great City or the Wickedest City in the World |Robert O. Harland