Etymology
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aureate (adj.)
early 15c., "resembling gold, gold-colored," also figuratively, "splendid, brilliant," from Latin aureatus "decorated with gold," from aureus "golden," from aurum "gold," from PIE root *aus- (2) "gold" (source also of Sanskrit ayah "metal," Avestan ayo, Latin aes "brass," Old English ar "brass, copper, bronze," Gothic aiz "bronze," Old Lithuanian ausas "gold"), which is probably related to root *aus- (1) "to shine."

Especially of highly ornamented literary or rhetorical styles. Related: Aureation.
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aet. 
"aged (some number of years)," abbreviation of Latin aetatis "of the age of," genitive singular of aetas "age" (see age (n.)). "Chiefly used in classic or scholarly epitaphs or obituaries" [Century Dictionary].
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eld (n.)
"former ages, old times," c. 1400, poetic or archaic form of old; in some cases from Old English eald, yldu, yldo "old age; an age; age as a period of life."
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ormolu (n.)

1765, "an alloy of copper, zinc, and tin resembling gold," from French or moulu, literally "ground gold," from or "gold" (from Latin aurum, from PIE *aus- (2) "gold;" see aureate) + moulu "ground up," past participle of moudre "to grind," from Latin molere "to grind" (from PIE root *mele- "to crush, grind"). The sense of the word before it reached English began as "gold leaf prepared for gilding bronze, brass, etc.," then shifted to "gilded bronze," then to various prepared metallic substances resembling it.

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nonage (n.)

late 14c., "childhood, minority, state of not being of age, period of legal infancy," from Anglo-French nounage (early 14c.), Old French nonaage, from non- (see non-) + age (see age (n.)). Figurative use from 1580s.

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thanage (n.)
c. 1400, from Anglo-French thaynage (c. 1300), from English thane + Old French suffix -age (see -age).
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anecdotage (n.)
1823, "anecdotes collectively," from anecdote + -age. As a jocular coinage meaning "garrulous old age" it is recorded from 1835, and spawned anecdotard (1894).
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ore (n.)

"a metalliferous mineral or rock," especially one worth mining, 12c., a merger of Old English ora "ore, unworked metal" (related to eorþe "earth;" see earth (n.); and cognate with Low German ur "iron-containing ore," Dutch oer, Old Norse aurr "gravel"); and Old English ar "brass, copper, bronze," from Proto-Germanic *ajiz- (source also of Old Norse eir "brass, copper," German ehern "brazen," Gothic aiz "bronze"), from PIE root *aus- (2) "gold" (see aureate). The two words were not fully assimilated till 17c.; what emerged has the regular modern form of ar but the meaning of ora.

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senile (adj.)
1660s, "suited to old age," from French sénile (16c.), from Latin senilis "of old age," from senex (genitive senis) "old, old man," from PIE root *sen- "old." Meaning "weak or infirm from age" is first attested 1848.
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oldness (n.)

"old age, decrepitude; great age, antiquity; the state of being old," Old English ealdnysse; see old + -ness.

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