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indigenous [indigenous 词源字典]: indigenous: [17] The -gen- of indigenous comes from the same ultimate source – Indo-European *gen- – as produced English gender, generate, genital, etc. It denoted ‘produce’. The addition of the Latin prefix indi- ‘in, within’, earlier indu- (a strengthened form of in- originally formed with de ‘down’, which also appears in indigent ‘poor’ [14] and industry) produced indigena ‘born or produced in a particular place, native’, which English adopted and adapted as indigenous.
=> gender, general, generate, genital, kind[indigenous etymology, indigenous origin, 英语词源]
indigence (n.): late 14c., from Old French indigence "indigence, need, privation" (13c.), from Latin indigentia "need, want; insatiable desire," from indigentem (nominative indigens), present participle of indigere "to need," from indu "in, within" + egere "be in need, want," from PIE *eg- "to lack" (cognates: Old Norse ekla "want, lack," Old High German eccherode "thin, weak").
indigency (n.): 1610s, from Latin indigentia (see indigence).
indigene: 1590s (adj.); 1660s (n.); from French indigène (16c.), from Latin indigena "sprung from the land," as a noun, "a native," literally "in-born" (see indigenous).
indigenous (adj.): 1640s, from Late Latin indigenus "born in a country, native," from Latin indigena "sprung from the land," as a noun, "a native," literally "in-born," or "born in (a place)," from Old Latin indu "in, within" (earlier endo) + *gene-, root of gignere (perf. genui) "beget," from PIE *gen- "produce" (see genus).
indigent (adj.): c. 1400, from Old French indigent, from Latin indigentem (see indigence). As a noun, "poor person," from early 15c.