combatant combatant /kəmˈbætənt/

adjective

1. () Engaging in or ready for combat  ( combatant )
   engaging in or ready for combat
   

noun

1. Someone who fights (or is fighting)  ( battler , belligerent , combatant , fighter , scrapper )
   someone who fights (or is fighting)
     The determined fighter trained tirelessly for the upcoming championship bout.
   The determined fighter trained tirelessly for the upcoming championship bout.