Etymology
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-oidal 

word-forming element making adjectives from nouns in -oid; see -oid + -al (1).

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-gon 

word-forming element meaning "angle, corner," from Greek gōnia "corner, angle," from PIE root *genu- (1) "knee; angle."

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-le 

instrumental word-forming element, the usual modern form of -el (1), a suffix originally used in Old English to form agent nouns.

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-osity 

word-forming element making nouns from adjectives in -ous, -ose (1); from French -osité, from Latin -ositatem (nominative -ositas), properly -ose + -ity.

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-ino 

word-ending in some English words from Spanish and Portuguese (albino, casino, etc.), the Spanish and Portuguese form of -ine (1), from Latin -inus/-inum.

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-phane 

word-forming element meaning "having the appearance of," from Greek -phanes, from phainein "bring to light, cause to appear, show," phainesthai "to appear" (from PIE root *bha- (1) "to shine").

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-teenth 

word-forming element making ordinal numbers from 13 to 19, from -teen + -th (1), displacing Old English -teoða, -teoðe (West Saxon), related to teogoða (Anglian) "tenth."

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calypto- 

word-forming element meaning "hidden, covered," from Latinized form of Greek kalyptos "covered," from kalyptein "to cover, conceal," from PIE root *kel- (1) "to cover, conceal, save."

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matri- 

word-forming element meaning "of or relating to a mother," also "of or relating to women," from combining form of Latin māter (genitive mātris) "mother" (see mother (n.1)).

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-grad 

Russian, "city," from Old Church Slavonic gradŭ "town, city, citadel," from PIE *ghor-dho-, from root *gher- (1) "to grasp, enclose," with derivatives referring to enclosure.

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