Warrior

The Japanese word 戦士 meaning "warrior; soldier; fighter" and is composed of the kanji 戦 (read sen) meaning "war; fight" and 士 (read shi) meaning "person". 戦士 does not have a specific connection to Bushido as, for example, 武者 Warrior (musha) does. So when the word "fighter" is used in the news 戦士 is the more common translation.

The Japanese word 武者 meaning "Warrior" is composed of the kanji 武 (read mu) meaning "Warrior; Military" and 者 (read sha) meaning "Person". The first kanji 武 is the same kanji used in Way of the Warrior (bushidou) and so musha implies a warrior in the Bushido tradition.

Incidently, 武者 is the same kanji used in the title of Akira Kurosawa's film Kagemusha meaning "Shadow Warrior".