also: ぐどうしゃ
noun
seeker after truth; one who seeks the way
Refers to a person dedicated to pursuing spiritual, philosophical, or moral truth, often in a religious or ascetic context.
彼は生涯をかけた求道者だった。
He was a lifelong seeker after truth.
求道者として山にこもり、修行を続けた。
As a seeker of the way, he secluded himself in the mountains and continued his training.
Compound of 求道 (kyūdō, 'seeking the way/truth') + 者 (sha, 'person'). The reading ぐどうしゃ is a less common variant.