This is the 17530th most frequent Polish word.
zbiegli
"Zbiegli" means "they escaped" or "they fled" in English.
In this sentence, 'zbiegli' indicates movement downwards, as 'zbiec' can also mean 'to come down' in some contexts.
Zbiegli na dół do piwnicy, aby się schować.
They ran down to the basement to hide.
Here, 'zbiegli' is part of the reflexive form 'zbiec się', meaning 'to gather together'.
Zbiegli się ludzie, aby pomóc w zagrożeniu.
People gathered to help during the danger.
Here, 'zbiegli' is used as the past tense of the verb 'zbiec', meaning 'they fled'.