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。

• proscription
• prose
• prosecute
• prosecution
• prosecutor
• proselyte
• proselytize
• prosody
• prospect
• prospective
• prospector
• prospectus
• prosper
• prosperity
• prosperous
• prostate
• prostatitis
• prosthesis
• prosthetics
• prostitute
• prostrate
• prostration
• prot-
• protactinium
• protagonist