IPA: //ˈdɛprɪdeɪtər//
KK: /dɛpˈrɛdətər/
A person or animal that attacks or plunders, causing damage or destruction.
The depredator moved silently through the forest, searching for its next prey.
Depredator is formed from "de-" (meaning down or away) and "praedari" (meaning to plunder or rob). The word describes someone who plunders or robs, emphasizing the act of taking away resources.
Think of someone who takes things 'down' or 'away' ('de-') by 'plundering' ('praedari') — that's why a depredator is someone who robs or plunders.