1. A period of three years

Derived forms: triennia, trienniums

• prepare
• prepare for
• prepared
• preparedness
• preparer
• prepay
• prepayment
• prepend
• prepense
• prepensely
• preponderance
• preponderant
• preponderantly
• preponderate
• preponderating
• prepone
• prepose
• preposition
• prepositional
• prepositional object
• prepositional phrase
• prepositionally
• prepositive
• prepossess
• prepossessing