Etymology
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avarice (n.)
c. 1300, "inordinate desire of gaining and possessing wealth," fifth of the seven deadly sins, from Old French avarice "greed, covetousness" (12c.), from Latin avaritia "greed, inordinate desire," from avarus "greedy, grasping," adjectival form of avere "crave, long for, be eager," from Proto-Italic *awe- "to be eager," from PIE *heu-eh- "to enjoy, consume" (source also of Sanskrit avasa- "refreshment, food," avisya- "gluttony;" Welsh ewyllys "will;" Armenian aviwn "lust"). In Middle English also of immoderate desire for knowledge, glory, power, etc.; it "has become limited, except in figurative uses, so as to express only a sordid and mastering desire to get wealth" [Century Dictionary].
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hasty (adj.)
mid-14c., "early; demanding haste, urgent; quick-tempered, angry;" late 14c. "speedy, swift, quick," by 1500s, from haste (n.) + -y (2); replacing or nativizing earlier hastif (c. 1300) "eager, impetuous," from Old French hastif "speedy, rapid; forward, advanced; rash, impetuous" (12c., Modern French hâtif), from haste (see haste (n.)). Meaning "requiring haste" is late 14c. (this is the sense in hasty-pudding, 1590s, so called because it was made quickly); that of "eager, rash" is from early 15c. Related: Hastiness. Old French also had a form hasti (for loss of terminal -f, compare joli/jolif, etc.), which may have influenced the form of the English word.
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flesh (v.)
1520s, "to render (a hunting animal) eager for prey by rewarding it with flesh from a kill," with figurative extensions, from flesh (n.). Meaning "to clothe or embody with flesh," with figurative extensions, is from 1660s. Related: Fleshed; fleshing.
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longing (n.)

"yearning, eager desire, craving," Old English langung "longing, weariness, sadness, dejection," verbal noun from long (v.).

2. Specifically, in pathol., one of the peculiar and often whimsical desires experienced by pregnant women. [Century Dictionary, 1899]
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willful (adj.)
also wilful, c. 1200, "strong-willed," usually in a bad sense, "obstinate, unreasonable," from will (n.) + -ful. From late 14c. as "eager" (to do something). Mid-14c., of actions, "done on purpose, intentional, due to one's own will." Related: Willfullness.
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enthusiastic (adj.)
c. 1600, "pertaining to possession by a deity," from Greek enthousiastikos "inspired," from enthousiazein "be possessed or inspired by a god" (see enthusiasm). Meaning "pertaining to irrational delusion in religion" is from 1690s. The main modern sense, in reference to feelings or persons, "intensely eager, rapturous," is from 1786. Related: Enthusiastically.
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enterprising (adj.)
"eager to undertake, prompt to attempt," 1610s, present-participle adjective from the verb enterprise (late 15c.), from the noun enterprise. Until mid-19c. (at least in Britain) mostly in a bad sense: "scheming, ambitious, foolhardy." Earlier (1560s) as a verbal noun meaning "action of undertaking."
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adulation (n.)

"servile or insincere praise," late 14c., from Old French adulacion, from Latin adulationem (nominative adulatio) "a fawning; flattery, cringing courtesy," noun of action from past-participle stem of adulari "to flatter, fawn upon."

This is usually said to be from ad "to" (see ad-) + a stem meaning "tail," from a PIE *ul- "the tail" (source also of Sanskrit valah "tail-hair," and Lithuanian valai "horse's tail"). The original notion would be "to wag the tail" like a fawning dog (compare Greek sainein "to wag the tail," also "to flatter;" also see wheedle).

But de Vaan finds phonetic problems with these and concludes the etymology is uncertain, though he proposes a connection with avidus "eager," via *adulo- "who is eager toward something," hence "a flatterer." Adulation may proceed from true blind worship or be insincere, from hope of advantage.

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officious (adj.)

1560s, "zealous, attentive, eager to serve," from Latin officiosus "full of courtesy, dutiful, obliging," from officium "duty, service" (see office). Sense of "meddlesome, doing more than is asked or required" had emerged by 1600 (in officiously). An officious lie (1570s) is one told to do good to another person (from Latin mendacium officiosum or French mensonge officieux). Related: Officiousness.

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vehement (adj.)

early 15c., from Old French vehement, veement "impetuous, ardent" (12c.), from Latin vehementem (nominative vehemens) "impetuous, eager, violent, furious, ardent, carried away," perhaps [Barnhart] from a lost present middle participle of vehere "to carry" (from PIE root *wegh- "to go, move, transport in a vehicle"). The other theory is that it represents vehe- "lacking, wanting" + mens "mind." Related: Vehemently.

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