passer：过路人，旅客；考试及格者；传球者

词根词缀： -pass-走,通过 + -er名词词尾

• opossum
• opponent
• opportune
• opportunism
• opportunist
• opportunity
• oppose
• opposite
• opposition
• oppress
• oppression
• oppressive
• oppressor
• opprobrious
• opprobrium
• Ops
• opt
• optant
• optic
• taurine
• taut
• tauten
• tautology
• tavern
• tawdry