One who conquers, subdues, or overcomes; a military conqueror or vanquisher.
From Latin debellator (he who conquers), formed from debellare (to overcome in war) plus the agent noun suffix -or/-ator. This Latin word formation pattern creates 'one who does X.'
Roman historians used this word proudly—a debellator was basically someone who expanded the empire, which tells you a lot about how Romans viewed military conquest as something noble and praiseworthy rather than aggressive!
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