Noun
ぶし
コウイチは武士のようにストイックに走り続け、フルマラソンを完走した。
Koichi kept running as stoically as a samurai and finished the full marathon.
A military samurai is a samurai. This is how most people say "samurai" in Japanese.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.