Refers to a person who seeks adventure, often used in fantasy, exploration, or risk-taking contexts.
彼は世界中を旅する冒険者だ。
He is an adventurer who travels the world.
その冒険者は未知の島を探検した。
The adventurer explored an unknown island.
Compound of 冒険 (ぼうけん, 'adventure') and 者 (しゃ, 'person').