Definition: make slack as by lessening tension or firmness
Synonyms: slacken
Definition: become looser or slack
Usage: the rope slackened
Similar words: weaken
Definition: become weaker
Usage: The prisoner's resistance weakened after seven days
Synonyms: slack, slacken, slow, slow down, slow up
Definition: become slow or slower
Usage: Production slowed
Similar words: weaken
Definition: become weaker
Usage: The prisoner's resistance weakened after seven days
Synonyms: slack, slack up, slacken, relax
Definition: make less active or fast
Usage: He slackened his pace as he got tired; Don't relax your efforts now