born-again
adjective
ˈbȯrn-ə-ˈgen 
-ˈgin,
-ˈgān
1
: of, relating to, or being a usually Christian person who has made a renewed or confirmed commitment of faith especially after an intense religious experience
2
: having returned to or newly adopted an activity, a conviction, or a persona especially with a proselytizing zeal
a born-again conservative
Word History
Etymology
from the verse "Except a man be born again, he cannot see the Kingdom of God" John 3:3 (King James Version)
First Known Use
1861, in the meaning defined at sense 1