swarming
adjective
[ ˈswɔːmɪŋ ]
• moving in or forming a large or dense group.
• "swarming locusts"
swarm
verb
• (of flying insects) move in or form a swarm.
• "a plague of locusts swarmed across the countryside"
• move somewhere in large numbers.
• "protesters were swarming into the building"
Origin:
Old English swearm (noun), of Germanic origin; related to German Schwarm, probably also to the base of Sanskrit svarati ‘it sounds’.
