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。

• the Furies
• thegn
• the heebie-jeebies
• The Heel of Achilles
• the high seas
• the Hippocratic oath
• the hit parade
• the hoi pollie
• the holy of holies
• the Holy See
• the hot seat
• the Internationale
• their
• theirs
• theism
• theist
• the Ivy League
• the Jolly Roger
• the last post
• the last rites
• the lion's share
• them
• the magistracy
• the main drag
• the mainland