armless：无臂的；无武装的；(动植物)无防护器官的  

词根词缀： -arm-武器 + -less形容词词尾,否定

• restructure
• result
• resultant
• resume
• resumption
• resupply
• resurface
• resurgent
• resurrect
• resurrection
• resuscitate
• retail
• retail
• retailer
• retailing
• retain
• retainer
• retaining
• retake
• retaliate
• retard
• retarded
• retell
• retention
• retest