Etymology
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multi- 

before vowels mult-, word-forming element meaning "many, many times, much," from combining form of Latin multus "much, many," from PIE *ml-to-, from root *mel- (2) "strong, great, numerous." It was much-used in forming Latin compounds in classical times and after (such as multianimis "having much courage," multibibus "much-drinking," multicomus "having much hair," multiloquus "talkative"). Many English words that use it (multinational, etc.) are 20c. coinages.

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multi-ply (adj.)

"having several layers or webs," 1887, from multi- "many" + ply (n.) "a layer, a fold."

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multi-millionaire (n.)

also multimillionaire, "one worth many millions" (of dollars, pounds, etc.), 1858, from multi- "many times" + millionaire.

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multi-use (adj.)

1941, "designed for different functions," from multi- "many" + use (n.). By 1945 as "designed to be used more than once," from multi- in the sense of "many times."

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multilineal (adj.)

also multi-lineal, "having many lines," 1800, from multi- + lineal. Multi-linear is by 1815.

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multifaceted (adj.)

also multi-faceted, "involving or having many facets," 1870, from multi- "many" + faceted (see facet).

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multiprocessor (n.)

also multi-processor, "computer system with more than one processor," 1961, from multi- "many" + processor.

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multilevel (adj.)

also multi-level, "having or involving several levels," 1952, from multi- "many" + level (n.).

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multiphase (adj.)

also multi-phase, "having or producing two or more phases," 1890, from multi- "many" + phase (n.).

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multipurpose (adj.)

also multi-purpose, "serving or intended to serve more than one purpose," 1906, from multi- "many" + purpose (n.).

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