What does the phrase ''kyrie eleison dies irae dies illa solvet saeclum in favilla Quando tremor est futurus Quando judex est venturus'' mean?

Answer 1

Kyrie Eleison - "Lord, have mercy"

Dies irae Dies illa - "The day of wrath, that day"

Solvet saeclum in favilla - "which will reduce the world to ashes."

Quando tremor est futurus - "Oh, what fear man's bosom rendeth,"

Quando judex est venturus - "when from heaven the judge descendeth"

- From the poem "Dies irae"

This is a famous thirteenth century latin hymn used previously in the Roman Catholic Requiem Mass.

Sources - Wikipedia