How to say "morale" in Japanese

• 士気しきCommon
  nounCovers morale in its usual sense of a group's spirit and confidence, especially among troops but also sports teams and workplaces. This is the ordinary word when you simply mean that morale is high or low.
  観客かんきゃく側がわから相手あいてチームをわらってやることは、その士気しきをくじくことになろう。↗

  It would demoralize the opposing team to give it the razz from the spectators' side.
• 戦意せんいCommon
  nounCovers morale specifically as the will to keep fighting, so it belongs to military or combat contexts. For general team or workplace morale it is seldom the word you want; use it when the fighting spirit itself is meant.

Use 士気 for the general morale or spirit of a group such as troops or a team, and 戦意 specifically for the will to fight in a combat context.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 士気しきmorale (of troops, team, etc.)
• 戦意せんいwill to fight
• モラールmorale