Synonyms and Antonyms of slacken
1 to make less taut you'll need to slacken the rope a bit to get it free of that post Synonyms ease, loosen, relax, slack Related Words detach, free, unbind, undo, unfasten, untie Near Antonyms attach, bind, fasten, tie; constrain, restrain Antonyms strain, stretch, tense, tension, tighten
2 to cause to move or proceed at a less rapid pace drivers need to slacken their speed as they approach the sharp curve Synonyms brake, decelerate, retard, slowRelated Words halt, stop; encumber, hamper, handicap, hinder, hobble, hold back, hold up, impede, inhibit, obstruct, set back, tie up; bottleneck; arrest, check, constrain, curb, rein, restrain; baffle, foil, frustrate, sabotage, thwartNear Antonyms drive, encourage, goad, propel, push, spur, stir, urge; advance, aid, dispatch, ease, expedite, facilitate, forward, further, helpAntonyms accelerate, hasten, hurry, quicken, rush, speed (up), step up
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