quatrefoil /katˈər-foil or katˈrə-foil/ or quatrefeuille /-fœ-ē or -fīl/

1. A four-petalled flower or leaf of four leaflets
2. An openwork design or ornament divided by cusps into four lobes (architecture)

• preforming
• preforms
• prefrontal
• prefrontals
• prefulgent
• preggers
• pre-glacial
• pregnable
• pregnance
• pregnances
• pregnancies
• pregnancy
• pregnant
• pregnantly
• pregustation
• pregustations
• prehalluces
• prehallux
• preheat
• preheated
• preheating
• preheats
• preheminence
• prehend
• prehended