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。

• consultation
• consultative
• consume
• consumer
• consuming
• consummate
• consumption
• consumptive
• contact
• contagion
• contagious
• contain
• containment
• contaminate
• contamination
• contemn
• contemplate
• contemporaneous
• contemporary
• contempt
• contend
• content
• contented
• contention
• contentment