slack water   (TTS Sound)

The slack_water has 2 Senses.

• slack water, slack
• a stretch of water without current or movement; "suddenly they were in a slack and the water was motionless"
• 流れや動きのない水の広がり

• slack tide, slack water
• the occurrence of relatively still water at the turn of the (low) tide
• 潮の流れ（干潮）が変わるとき比較的水がなぐ現象