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endless (adj.)[endless 词源字典]: Old English endeleas "boundless, eternal;" see end (n.) + -less. Compare Old Saxon endilos, Dutch eindeloos, German endlos. Related: Endlessly; endlessness. Old English used endeleasnes for "infinity, eternity."[endless etymology, endless origin, 英语词源]
friendless (adj.): Old English freondleas "friendless," also "orphan," and, as a noun, "an outlaw;" see friend (n.) + -less. Related: Friendlessly; friendlessness.