arhat
noun
ar·hat ˈär-(ˌ)hət 
: a Buddhist who has reached the stage of enlightenment
arhatship
ˈär-(ˌ)hət-ˌship
noun 
Word History
Etymology
Sanskrit, from present participle of arhati he deserves; akin to Greek alphein to gain
First Known Use
1809, in the meaning defined above