ἐκγελᾶν
From LSJ
διφθέραι σταδιαῖαι τοῖς μεγέθεσιν → hides a stade in size, hides fastened together so as to cover a place an entire stadium in extent
Greek > English (Woodhouse Verbs Reversed)
(see also: ἐκγελάω) burst out laughing, laugh aloud, laugh outright