Etymology
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memorial (adj.)

late 14c., "memorable, excellent," also "remembered, committed to memory," from Old French memorial "mindful of, remembering" (Modern French mémorial), and directly from Latin memorialis "of or belonging to memory," from memoria "memory" (from PIE root *(s)mer- (1) "to remember"). From mid-15c. as "preservative of memory, serving for commemoration."

A Middle English word for "having to do with memory" was memorative (late 14c.), from Old French memoratif, from Latin memorativus. Though useful, it apparently has not survived.

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memorial (n.)

late 14c., "fame, renown, reputation," also "a commemorative gesture, monument, or rite;" in general, "something by which the memory of a person, thing, or event is preserved," from Old French memorial "record, report," and directly from Late Latin memoriale "a memorial," noun use of neuter of Latin memorialis (adj.) "of or belonging to memory," from memoria "memory" (from PIE root *(s)mer- (1) "to remember").

Meaning "memorial act, commemorative gesture, monument, etc.," is from late 14c., as is the sense of "a written representation of facts made to a legislative or other body as the grounds for a petition." Related: Memorialist.

The old Man said, “I see around me here
Things which you cannot see: we die, my Friend,
Nor we alone, but that which each man loved
And prized in his peculiar nook of earth
Dies with him or is changed, and very soon
Even of the good is no memorial left.
[Wordsworth, "The Ruined Cottage"]
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memorialize (v.)

"to present a memorial to, petition by memorial," 1708; "to commemorate, preserve the memory of," 1765; from memorial + -ize. Related: Memorialized; memorializing.

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immemorial (adj.)
c. 1600, from French immémorial "old beyond memory" (16c.), from Medieval Latin immemorialis, from assimilated form of in- "not, opposite of" (see in- (1)) + Latin memorialis of or belonging to memory" (see memorial (n.)). Something immemorial is ancient beyond memory; something immemorable is not worth remembering. Latin immemor meant "unmindful, forgetful, heedless."
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festschrift (n.)
"volume of writings by various scholars presented as a tribute or memorial to a veteran scholar," 1898, from German Festschrift, literally "festival writing" (see -fest + script (n.)).
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monument (n.)

late 13c., "a sepulchre," from Old French monument "grave, tomb, monument," and directly from Latin monumentum "a monument, memorial structure, statue; votive offering; tomb; memorial record," literally "something that reminds," a derivative of monere "to remind, bring to (one's) recollection, tell (of)," from PIE *moneie- "to make think of, remind," suffixed (causative) form of root *men- (1) "to think." Meaning "any enduring evidence or example" is from 1520s; sense of "structure or edifice to commemorate a notable person, action, period, or event" is attested from c. 1600.

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obit (n.)

late 14c., "death," a sense now obsolete, from Old French obit or directly from Medieval Latin obitus "death" (a figurative use, literally "a going down, a going to a place"), noun use of past participle of Latin obire "to die," literally "to go toward" (see obituary).

From c. 1400 as "anniversary of a person's death; memorial service held on the anniversary of a person's death." In modern usage (since 1874) it is usually a clipped form of obituary, though it had the same meaning of "published death notice" 15c.-17c. The scholarly abbreviation ob. with date is from Latin obiit "(he) died," third person singular of obire.

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representation (n.)

c. 1400, representacioun, "image, likeness symbolic memorial," from Old French representacion (14c.) and directly from Latin repraesentationem (nominative repraesentatio), "a bringing before one, a showing or exhibiting," noun of action from past-participle stem of repraesentare "show, exhibit, display" (see represent (v.)).

The sense of "act of presenting to the mind or imagination" is attested by 1640s. The meaning "statement made in regard to some matter" is from 1670s. Legislative sense of "fact of representing or being represented" is by 1769, thus "share or participation in legislation, etc., by means of regularly chosen or appointed delegates; the system by which communities and societies have a voice in their own affairs and the making of their laws."

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glutton (n.)

"one who eats and drinks to excess," early 13c., from Old French gloton "glutton;" also "scoundrel," a general term of abuse (Modern French glouton), from Latin gluttonem (nominative glutto) "overeater," which is related to gluttire "to swallow," gula "throat" (see gullet). General sense in reference to one who indulges in anything to excess is from 1704. Glutton for punishment is from pugilism; the phrase is from 1854, but the idea is older:

Thus, Theocritus, in his Milling-match, calls Amycus "a glutton," which is well known to be the classical phrase at Moulsey-Hurst, for one who, like Amycus, takes a deal of punishment before he is satisfied. [Tom Moore, "Tom Crib's Memorial to Congress," 1819]
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decoration (n.)

early 15c., decoracioun, "the covering of blemishes with cosmetics;" 1580s, "action of adorning with something becoming or ornamental," from Medieval Latin decorationem (nominative decoratio), noun of action from past-participle stem of Latin decorare "to decorate, adorn, embellish, beautify," from decus (genitive decoris) "an ornament; grace, dignity, honor," from PIE root *dek- "to take, accept" (on the notion of "to add grace"),

Meaning "that which decorates" is from 1670s. As "a badge or medal worn as a mark of honor" (often in plural, decorations), also "the conferring of a badge or medal of honor," by 1816. In U.S., Decoration Day (by 1870) was another old name for Memorial Day (q.v.), when the graves of the Civil War dead from the North were decorated with flowers.

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