Hai cercato la traduzione di gravissima da Latino a Inglese

gravissima latina, est non omnis
eine große lateinprüfung, es ist nicht jede

fecitque dominus ita et venit musca gravissima in domos pharaonis et servorum eius et in omnem terram aegypti corruptaque est terra ab huiuscemodi musci
and the lord did so; and there came a grievous swarm of flies into the house of pharaoh, and into his servants' houses, and into all the land of egypt: the land was corrupted by reason of the swarm of flies.

fiebat enim pavor mortis in singulis urbibus et gravissima valde manus dei viri quoque qui mortui non fuerant percutiebantur in secretiori parte natium et ascendebat ululatus uniuscuiusque civitatis in caelu
and the men that died not were smitten with the emerods: and the cry of the city went up to heaven.