Pronunciation:  \vûrv\
Function:  noun

• the spirit and enthusiasm animating artistic composition or performance:  vivacity
• energy, vitality

Pronunciation:  \sěn’trəl\
Function:  adjective

• containing or constituting a center
• of primary importance:  essential, principal
• situated at, in, or near the center:  easily accessible from outlying districts
• centrally placed and superseding separate scattered units

from Merriam-Webster's Dictionary