Etymology
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imperfect (adj.)
late 14c., imparfit, "sinful, immoral; not properly formed, not complete, immature; rudimentary, elementary," from Old French imparfait, from Latin imperfectus "unfinished, incomplete, immature," from assimilated form of in- "not, opposite of" (see in- (1)) + perfectus "finished, complete" (see perfect (adj.)). Altered mid-16c. to conform to Latin, along with perfect. Related: Imperfectly.
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imperfection (n.)
late 14c., "incompleteness, deficiency, lack," from Old French imperfeccion "defect; imperfect state" (12c.) and directly from Late Latin imperfectionem (nominative imperfectio) "imperfection," noun of action from Latin imperfectus "imperfect"(see imperfect). Meaning "an instance of being imperfect" is from early 15c.
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atelo- 
word-forming element meaning "imperfect development or structure," from Greek ateles "imperfect, incomplete," literally "without an end," from a- "not, without" (see a- (3)) + telos "the end, fulfillment, completion" (see telos).
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malabsorption (n.)

"imperfect absorption (of food, by the body)," 1879, from mal- + absorption.

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glimpse (n.)
1530s, "faint or transient appearance," from glimpse (v.). From 1570s as "a brief and imperfect view." Earlier was the verbal noun glimpsing "imperfect vision" (late 14c.).
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maleducation (n.)

also mal-education, "imperfect or misdirected education," 1840, from mal- + education.

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malnutrition (n.)

"defect of sustenance from imperfect assimilation of food," 1843, from mal- + nutrition.

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wastrel (n.)
"spendthrift, idler," 1847, from waste (v.) + pejorative suffix -rel. Earlier "something useless or imperfect" (1790).
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malassimilation (n.)

also mal-assimilation, "faulty digestion, imperfect nutrition," 1840, from mal- + assimilation.

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misperception (n.)

"imperfect or erroneous perception," 1722; see mis- (1) "bad, wrong" + perception. Related: Misperceive (by 1867); misperceived; misperceiving.

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