Buddhism one who has attained nirvana and, thus, is no longer subject to the cycle of rebirth
Origin of arhatSanskrit from arhat, adjective , deserving (respect)
One who has attained enlightenment.
Origin of arhatSanskrit from present participle of arhati he deserves
From Sanskrit अर्हत् (árhat, “enlightened one, holy one”), originally "worthy of worship".