perpend：细思，考虑，斟酌   

词根词缀：per-完全 + -pend-称量→仔细称量/掂量

• clutch
• clutter
• coach
• coaching
• coaching inn
• coagent
• coagulate
• coal
• coalesce
• coalescence
• coalescent
• coalface
• coalition
• coarse
• coast
• coaster
• coat
• coati
• coating
• coax
• cob
• cobalt
• cobber
• cobble
• cobbles