warrior

n. fighter, soldier, one experienced in warfare

A warrior is a person habitually engaged in warfare. In tribal societies engaging in endemic warfare, warriors often form a caste or class of their own. In feudalism, the vassals essentially form a military or warrior class, even if in actual warfare, peasants may be called to fight as well. In some societies, warfare may be so central that the entire people (or, more often large parts of the male population) may be considered warriors, for example in the Iron Age Germanic tribes or the Medieval Rajputs.
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Noun
1. someone engaged in or experienced in warfare
(hypernym) person, individual, someone, somebody, mortal, human, soul
(hyponym) brave
(derivation) war

(n.)
A man engaged or experienced in war, or in the military life; a soldier; a champion.
  

yi4 gu3 zuo4 qi4
Plucking up courage with the first drum.
The soldier's morale is at its highest with the first beat of the battle drum. This expression is used to encourage people to continue and finish what they're doing.