slack

sense 1: avoid responsibilities and work, be idle
slack

sense 2: be inattentive to, or neglect, as of duties; "He slacks his attention"
slack

sense 3: release tension on; "slack the rope"
slack

sense 4: make less active or fast; "He slackened his pace as he got tired"; "Don't relax your efforts now"
slack slacken slack_up relax

sense 5: become slow or slower; "Production slowed"
slow slow_down slow_up slack slacken

sense 6: make less active or intense
slake abate slack

sense 7: become less in amount or intensity; "The storm abated"
abate let_up slack_off slack die_away

sense 8: cause to heat and crumble by treatment with water, as of lime
slack slake