Etymology
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max (v.)

"to reach the maximum level," by 1986, colloquial, from maximize or related words. Related: Maxed; maxing. As a noun, by 1811 in reference to a kind of gin said to be the best, apparently an abbreviation of French maxime.

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kathenotheism (n.)

"a form of polytheism characteristic of the Vedic religion, in which one god at a time is considered supreme," 1865, coined in German by Max Müller from Greek kath' hena "one by one" (from kata- "according to" + en- "one") + -theism. Müller also coined the nearly synonymous henotheism (1860, from Greek henos "one") for "faith in a single god" as distinguished from exclusive belief in only one god, in writings on early Hebrew religion. He also has adevism (from Sanskrit deva "god") for "disbelief in the old gods and legends").

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henotheism (n.)

"devotion to a single god without asserting that he or she is the only god," 1860, from Greek henos (neuter of heis "one;" from PIE root *sem- (1) "one; as one, together with") + -theism. Coined by (Friedrich) Max Müller (1823-1900), professor of comparative philology at Oxford. Supposedly a characteristic of the oldest Hindu religion; or a system between monotheism and polytheism. Related: Henotheist; henotheistic.

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Betamax (n.)

1975, proprietary name (Sony), from Japanese beta-beta "all over" + max, from English maximum.

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Braun 

German manufacturing company, named for founder Max Braun, mechanical engineer in Frankfurt am Main (1921).

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Geiger counter (n.)

1924, named for German physicist Hans Geiger (1882-1945), who invented it with Walther Müller. The surname is literally "fiddler."

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Planck 

in physics, in reference to the work of German physicist Max Planck (1858-1947); such as Planck's constant, attested in English from 1901.

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permafrost (n.)

"subsoil frozen year-round, as in the Arctic regions," 1943, coined in English by Russian-born U.S. geologist Siemon W. Muller (1900-1970) from perm(anent) frost.

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boo-boo (n.)

"mistake," 1954, apparently a reduplication of boob "stupid person," which had acquired a secondary sense of "foolish mistake" (1934). In 1930s it was the nickname of Philadelphia gangster Max "Boo-Boo" Hoff.

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waterfront (n.)

also water-front, 1834, American English, from water (n.1) + front (n.). To cover the waterfront "deal with thoroughly" is attested from 1913; I Cover the Waterfront was a 1932 best-seller by San Diego newspaperman Max Miller.

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