Etymology
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pen- 

a Brythonic (Celtic) word for "head;" common in place names in Cornwall and Wales (such as Penzance; see also pendragon and Pennsylvania).

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lipo- (1)
word-forming element meaning "fat" (n.), from Greek lipos "fat" (n.), from PIE root *leip- "to stick, adhere," also used to form words for "fat."
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circum- 

word-forming element meaning "around, round about, all around, on all sides," from Latin adverb and preposition circum "around, round about," literally "in a circle," probably accusative form of circus "ring" (see circus). The Latin word was commonly used in word-formation. In French, the element became circon-; Kitchin points out that con for cum is common even in classical Latin. For sense development, compare German rings "around."

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deoxy- 

also desoxy-, word-forming element used to make chemical names for compounds which contain fewer oxygen atoms than other compounds, from de- + first two syllables of oxygen.

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e- 

the later Romans evidently found words beginning in sc-, sp-, st- difficult or unpleasant to pronounce; in Late Latin forms begin to emerge in i- (such as ispatium, ispiritu), and from 5c. this shifted to e-. The development was carried into the Romanic languages, especially Old French, and the French words were modified further after 15c. by natural loss of -s- (the suppression being marked by an acute accent on the e-), while in other cases the word was formally corrected back to the Latin spelling (for example spécial). Hence French état for Old French estat for Latin status, etc. It also affected Romanic borrowings from Germanic (such as espy, eschew).

A different e- is a reduced form of Latin ex- before consonants (see ex-), and the e- in enough is an unfelt survival of an Old English alternative form of ge-.

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theo- 
word-forming element meaning "god, gods, God," from Greek theos "god," from PIE root *dhes-, forming words for religious concepts, such as Latin feriae "holidays," festus "festive," fanum "temple."
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turbo- 
word-forming element, abstracted c. 1900 from turbine; influenced by Latin turbo "spinning top." E.g. turbocharger (1934), aeronautic turboprop (1945, with second element short for propeller); turbojet (1945).
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hylo- 

word-forming element meaning "wood, forest," also "matter," from Greek hylos "a wood, a forest, woodland; wood, firewood, timber; stuff, material," used by Aristotle for "matter" in the philosophical sense; a word of unknown origin.

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biblio- 
word-forming element meaning "book" or sometimes "Bible," from Greek biblion "paper, scroll," also the ordinary word for "a book as a division of a larger work;" originally a diminutive of byblos "Egyptian papyrus." This is perhaps from Byblos, the Phoenician port from which Egyptian papyrus was exported to Greece (modern Jebeil, in Lebanon; for sense evolution compare parchment). Or the place name might be from the Greek word, which then would be probably of Egyptian origin. Compare Bible. Latin liber (see library) and English book also are ultimately from plant-words.
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pyelo- 

before vowels pyel-, medical word-forming element used from mid-19c. in forming medical terms, from Greek pyelos "oblong trough, bathing-tub," a word of uncertain etymology, taken in modern scientific use for "pelvis."

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