mrgoléti to teem; to swarm; to be alive (with)
rib mrgoli v tem jezeru fish teem in this lake, this lake is teeming with fish
na ulicah mrgoli ljudi the streets are swarming with people
v mestu mrgoli vohunov the town is swarming with spies
v tej pokrajini mrgoli divjačine this region is swarming with game