amphoteric /am-fō-terˈik or -fə-/

1. Of both kinds
2. Acting both ways, eg as acid and base, electropositive and electronegative

• preposterous
• preposterously
• preposterousness
• prepostor
• prepostors
• prepotence
• prepotences
• prepotencies
• prepotency
• prepotent
• prepped
• preppier
• preppies
• preppiest
• preppily
• preppiness
• preppinesses
• prepping
• preppy
• preprandial
• prepress
• prepresses
• pre-print
• pre-prints
• preproduction