Etymology
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Kiribati 
island nation in the Pacific, formerly Gilbert Islands and named for Capt. Thomas Gilbert, who arrived there 1788 after helping transport the first shipload of convicts to Australia. At independence in 1979 it took the current name, which represents the local pronunciation of Gilbert. Christmas Island, named for the date it was discovered by Europeans, is in the chain and now goes by Kiritimati, likewise a local pronunciation of the English name.
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republic (n.)

"state in which supreme or executive power rests in the people via representatives chosen by citizens entitled to vote," c. 1600, from French république (15c.), from Latin respublica (ablative republica) "the common weal, a commonwealth, state, republic," literally res publica "public interest, the state," from res "affair, matter, thing" (see re) + publica, fem. of publicus "public" (see public (adj.)).

Applied to particular states so constituted by 1630s. The notion of "community in which there is a certain equality of members" is behind such expressions as republic of letters "collective body of those engaged in literary pursuits," attested from 1702.

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banana republic (n.)
"small Central American state with an economy dependent on banana production," 1901, American English.
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republican (adj.)

1712, "belonging to a republic, of the nature of a republic, consonant to the principles of a republic," from republic + -an. With capital R-, "of, pertaining to, or favoring one of the various American parties that have been called Republican," by 1806 (the modern GOP dates from 1854). The French republican calendar was in use from Nov. 26, 1793 to Dec. 31, 1805. Earlier adjectives included republical (1650s), republicarian (1680s).

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SSR 
1926, from Russian, initialism (acronym) for Sovetskaya Sotsialisticheskaya Respublika "Soviet Socialist Republic."
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Pilipino 

"national language of the Republic of the Philippines," 1936, from Tagalog form of obsolete Spanish Pilipino (see Filipino).

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ARVN (n.)
acronym for Army of the Republic of Vietnam, ground military force of South Vietnam, organized 1955.
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Andorra 
small republic in the Pyrenees between France and Spain, probably from indigenous (Navarrese) andurrial "shrub-covered land." Related: Andorran.
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Argentine (adj.)
"of or from Argentina," 1830 (from 1829 as a noun, "citizen or inhabitant of the Argentine Republic"); Argentinian is from 1845 as a noun, 1858 as an adjective.
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Bolivia 
South American republic, founded 1825, named for Simon Bolivar (1783-1830), statesman and soldier.
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