A person or military force that besieges a place; one who surrounds and attacks a fortified location.
From 'besiege' combined with the agent suffix '-er,' which indicates someone who performs an action. A besieger is the active agent doing the surrounding.
In medieval history, besiegers were the ultimate test of military strategy—they had to figure out how to starve out a city or break through walls, which led to wild inventions like catapults and siege towers.
Complete word intelligence in one call. Free tier — 50 lookups/day.