"the team went into a slump"
"a gradual slack in output"
"a drop-off in attendance"
"a falloff in quality"
"suddenly they were in a slack and the water was motionless"
"he hadn't counted on the slackness of the rope"
"he took up the slack"
"the old man's skin hung loose and grey"
"slack and wrinkled skin"
"slack sails"
"a slack rope"
"slack water"
"such lax and slipshod ways are no longer acceptable"
"lax in attending classes"
"slack in maintaining discipline"
"He slacks his attention"
"slack the rope"
"He slackened his pace as he got tired"
"Don't relax your efforts now"
"Production slowed"
"The storm abated"
"The rain let up after a few hours"
"slack lime"