בָּלַג

From LSJ

τὸ πλῆθος οὐκ εὐαρίθμητον ἦν → the crowd wasn't easy to count, the crowd was not small, it was not a small crowd

Source

English (Strong)

a primitive root; to break off or loose (in a favorable or unfavorable sense), i.e. desist (from grief) or invade (with destruction): comfort, (recover) strength(-en).