the.com/horde

means A large, loosely organized group of people (or things) moving or acting together, often with a sense of overwhelming numbers.

from Borrowed into English in the 1500s-1600s from Polish/Turkic 'orda' or 'ordu', meaning a nomadic camp or tribal community — the word that gave Europe its image of the Mongol and Tatar hordes sweeping across the steppe. The initial 'h' was added later in European languages, possibly influenced by the Greek word 'horos' (boundary) or just by scribes wanting it to look more fittingly fierce. So the word itself rode in from the same plains it describes.