combatant

Compared meaning: a person taking part in fighting or war (noun).

比较义项：战斗人员、参与战斗或战争的人（名词）。

• fighter

  A general, everyday word for someone who fights physically, whether in war, a sport match, or a street brawl; informal and broad in register.

  一个通用的日常词，指进行身体打斗的人，可以是在战争、体育比赛或街头斗殴中；语域非正式，含义较宽泛。

  The young fighter trained every day to prepare for the match.

  这位年轻的战士每天训练，为比赛做准备。

• combatant 本词

  A formal, often legal or military term for a person officially taking part in a war or armed conflict, as opposed to a civilian or non-combatant.

  一个正式的、常用于法律或军事语境的词，指正式参与战争或武装冲突的人，与平民或非战斗人员相对。

  Every combatant in the war returned home exhausted and changed.

  战争中的每一名战斗员回国时都精疲力竭，变了一个人。

Fighter and combatant both mean a person who takes part in fighting. Fighter is a general, everyday word for anyone who fights, in war, sport, or a brawl. Combatant is a formal, legal or military term for someone officially taking part in a war.

这两个词都指参与战斗的人，但 fighter 更口语化，泛指打斗或战斗的人（也常指格斗运动员或战斗机），而 combatant 是正式、法律或军事用语，强调在战争或武装冲突中正式参战的一方。这里不比较 fighter 的“战斗机”义项。