Etymology
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outflow (n.)

1869, "act or fact of flowing out, a flowing out or forth;" 1875, "that which flows out," from out- + flow (n.).

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mellifluent (adj.)

"flowing like honey, smoothly or sweetly flowing," c. 1600, from French mellifluent and directly from Late Latin mellifluentem (nominative mellifluens), related to mellifluus (see mellifluous). Related: Mellifluence.

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mellifluous (adj.)

early 15c., "sweet as honey, pleasing, sweetly or smoothly flowing" (of an odor, a style of speaking or writing, etc.), from Late Latin mellifluus "flowing with (or as if with) honey," from Latin mel (genitive mellis) "honey" (related to Greek meli "honey;" from PIE root *melit- "honey") + -fluus "flowing," from fluere "to flow" (see fluent). Related: Melifluously; melifluousness.

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interflow (n.)
"a flowing into each other," 1839, from inter- + flow (n.).
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alluvial (adj.)
"deposited by flowing water," 1794; see alluvium + -al (1).
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fluid (adj.)

early 15c., "liquid, capable of flowing," from Old French fluide (14c.) and directly from Latin fluidus "fluid, flowing, moist," from fluere "to flow" (see fluent). Figurative use, of non-material things, "not fixed or rigid," from 1640s. Related: Fluidly.

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influent (adj.)
mid-15c., "abundant, flowing in," in reference to occult power of the stars, etc., also of grace, from Latin influentem (nominative influens) "flowing in," present participle of influere "to flow in" (see influence (n.)). Also occasionally in the sense "influential" (1630s).
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reflux (n.)

early 15c., "a flowing back" (of the sea, etc.), "ebb tide," also figurative of instability, from Medieval Latin refluxus, from Latin re- "back, again" (see re-) + fluxus "a flowing," from fluere "to flow" (see fluent). Digestive sense is recorded from 1937; reflux-valve is attested by 1853.

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effluence (n.)
c. 1600, "that which flows out;" 1620s, "act of flowing out," from Late Latin effluentia, from Latin effluentem (nominative effluens) "flowing out," present participle of effluere "to flow out," from assimilated form of ex "out" (see ex-) + fluere "to flow" (see fluent). Related: Effluency.
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affluence (n.)

mid-14c., "a plentiful flowing, an abundant supply," from Old French affluence, from Latin affluentia "affluence, abundance," literally "a flowing to," abstract noun from affluentem (nominative affluens) "flowing toward; abounding, rich, copious" (see affluent). The notion in the figurative Latin sense is of "a plentiful flow" of the gifts of fortune, hence "wealth, abundance of earthly goods," a sense attested in English from c. 1600. Latin affluentia is glossed in Ælfric's vocabulary (late Old English) by oferflowendnys.

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