inflator：充气者，充气机，打气筒 

词根词缀：in-入,向内 + -flat-吹 + -or

• rugged
• ruin
• ruination
• rule
• ruler
• rum
• overblown
• overbook
• overbridge
• overburden
• overcapacity
• overcast
• overcautious
• overcharge
• overcoat
• overcome
• overcompensate
• overdeveloped
• overdo
• overdog
• overdose
• overdraft
• overdraw
• overdressed
• overdub