combatant

a person that takes part in armed strife

  1. collaborator

compensation demanded by the victor from its vanquished foe

  1. euthanasia

to cooperate, usually willingly, with an enemy nation

  1. reparation

the practice of ending the life of an individual suffering from an incurable condition

Verified Answer :

The correct answer for the question that is being presented above is this one:
(1) combatant = person that takes part in armed strife
(2) collaborator = to cooperate, usually willingly, with an enemy nation
(3) euthanasia = the practice of ending the life of an individual suffering from an incurable condition
(4) reparation = compensation demanded by the victor from its vanquished foe