What is to render slack; to make less tense or firm; as, to slack a rope; to slacken a bandage. Wycklif (Acts xxvii. 40) called?

slacken — To render slack; to make less tense or firm; as, to slack a rope; to slacken a bandage. Wycklif (Acts xxvii. 40). (Webster's 1913.)

Sources