Slacken

Don't slacken your pace now! You're almost at the finish line!

The most precious possession you have in the world is your own people. And for this people, and for the sake of this people, we will struggle and fight, and never slacken, never tire, never lose courage, and never lose faith.

Will Australia slacken its immigration rules?

Just as the storm reaches its peak, the winds begin to slacken, and the sky starts to brighten.

The pace slackened.

He seemed tired, and the Rat let him rest unquestioned, understanding something of what was in his thoughts; knowing, too, the value all animals attach at times to mere silent companionship, when the weary muscles slacken and the mind marks time.

The action moves at lightening ^([sic]) pace, never slackening for a moment.

slacken the rope

During this interlude, Warwick, though he had slackened his pace measurably, had so nearly closed the gap between himself and them as to hear the old woman say, with the dulcet negro intonation: […]

Elk slackened the rope so he could walk farther away, and together they went awkwardly up the trail toward the grassy little flat[…]