slacken：使松驰，使松散，放慢，减缓，萧条

slack,松懈的，-en,使。引申诸相关词义。

• meaningless
• means
• means test
• meantime
• meanwhile
• meany
• measles
• measly
• measurable
• measure
• measured
• measureless
• measurement
• meat
• meat and potatoes
• meat and two veg
• meaty
• mebibit
• mebibyte
• Mecca
• mecca
• mechanic
• mechanical
• mechanician
• mechanics