The Requiem Mass Word is 'IRAE', which is a Latin word meaning 'WRATH'. It is used in the Roman Catholic Requiem Mass, which is a special mass for the dead. The Requiem Mass includes prayers and hymns that are meant to bring comfort to those mourning the loss of a loved one. The word 'Irae' is often used in the context of the Last Judgment, when God will judge all people according to their deeds.