2nd person singular of the imperative of the Latin verb misereor, have mercy, pity is, compassionate, forgiving. It entitles a penitential hymn in the Christian liturgy of the Holy week, Renaissance polyphonic hymn created in the 17TH century by the Italian musician Gregorio Allegri with the text of Psalm 51 in which King David to the accusation of Nathan seeks forgiveness for adultery c on Bathsheba, whose husband intentionally exposes in combat. The full title is Miserere mei, Deus: have mercy on me, Lord.