late 12c., "God's forgiveness of his creatures' offenses," from O.Fr. mercit, merci "reward, gift, kindness," from L. mercedem (nom. merces) "reward, wages, hire" (in V.L. "favor, pity"), from merx (gen. mercis) "wares, merchandise." In Church L. (6c.) applied to the heavenly reward of those who show kindness to the helpless. Meaning "disposition to forgive or show compassion" is attested from early 13c. As an interjection, attested from mid-13c. In French largely superseded by miséricorde except as a word of thanks. Seat of mercy "golden covering of the Ark of the Covenant" (1530) is Tyndale's loan-translation of Luther's gnadenstuhl, an inexact rendering of Heb. kapporeth, lit. "propitiatory."
51st Psalm (one of the Penitential Psalms), 13c., from Miserere mei Deus "Have mercy upon me, O God," opening line, from L. miserere "have mercy," imperative of misereri "to have mercy," from miser. From 15c.-17c. used as an informal measure of time, "the time it takes to recite the Miserere." Also in miserere mei "kind of severe colic ('iliac passion') accompanied by excruciating cramps and vomiting of excrement" (1611).
early 13c., Gk. liturgical formula, adopted untranslated into Latin Mass, lit. "lord have mercy" (Ps. cxxii.3, Matt. xv.22, xvii.15, etc.). From kyrie, vocative of kyrios "lord, master" (see church) + eleeson, aorist imperative of eleo "I have pity on, show mercy to," from eleos "pity, mercy" (see alms).
1215, earlier amercy, Anglo-Fr. amercier "to fine," from merci "mercy, grace" (see mercy). The legal phrase estre a merci "to be at the mercy of" (a tribunal, etc.) was corrupted to estre amercié in an example of how a legalese adv. phrase can become a verb (cf. abandon). The sense often was "to fine arbitrarily."
"Frans hom ne seit amerciez pour petit forfet." [Magna Charta]
1886, named by its Austrian manufacturer Emil Jellinik for his daughter, Mercedes. The fem. proper name is from Sp., abbrev. of Maria de las Mercedes "Mary of the Mercies," from pl. of merced "mercy, grace," from L. mercedem (nom. merces), see mercy.
O.E. ælmesse, from P.Gmc. *alemosna, an early borrowing of V.L. *alemosyna, from Church L. eleemosyna (Tertullian, 3c.), from Gk. eleemosyne "pity, mercy," in Ecclesiastical Gk. "charity, alms," from eleemon "compassionate," from eleos "pity, mercy," of unknown origin, perhaps imitative of cries for alms.
1892, from Yiddish khutspe "impudence, gall" from Heb. hutspah. The classic definition is that given by Leo Rosten: "that quality enshrined in a man who, having killed his mother and father, throws himself on the mercy of the court because he is an orphan."
1857, name of a pool in Jerusalem (John v.2), from Gk. Bethesda, from Aramaic beth hesda "house of mercy." Popular as a name for religious meeting houses among some Protestant denominations.
1606, from Gk. euthanasia "an easy or happy death," from eu- "good" + thanatos "death." Sense of "legally sanctioned mercy killing" is first recorded in Eng. 1869.
1388, from L.L. propitiationem (nom. propitiatio) "an atonement," from L. propitiare "render favorable," from propitius "favorable, gracious, kind," from pro- "forward" + petere "go to" (see petition). Earliest recorded form of the word is propitiatorium, "the mercy seat, place of atonement" (c.1200), transl. Gk. hilasterion. The verb propitiate is attested from 1645, from L. propitiatus, pp. of propitiare.Propitious "favorable" is from 1447.