The Japanese Kanji "侍 (さむらい-samurai orはべる-haberu)" means "Samurai" or "serve to" other. We have several words in which the kanji "侍" is used. Here are some examples;
"侍従 (じじゅう-jijuu)" means a person who serves for emperor or nobleman.
"侍臣 (じしん-jishin)" means a person who serves or works for his lord.
"侍医 (じい-jii)" means a doctor who serves for emperor.