flatus：肠胃胀气，屁，阵风，气息，一阵风   

词根词缀： -flat-吹 + -us名词词尾

• preregister
• prerequisite
• prerogative
• presage
• presby-
• presbyter
• Presbyterian
• presbytery
• preschool
• prescient
• prescribe
• prescription
• prescriptive
• preselect
• presell
• presence
• present
• presentable
• presentation
• presenteeism
• presenter
• presentiment
• preservation
• preservative
• preserve