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intangible (adj.)[intangible 词源字典]: 1630s, "incapable of being touched," from French intangible (c. 1500) or directly from Medieval Latin intangibilis, from in- "not" (see in- (1)) + Late Latin tangibilis "that may be touched" (see tangible). Figurative sense of "that cannot be grasped by the mind" is from 1880. Noun meaning "anything intangible" is from 1914. Related: Intangibly.[intangible etymology, intangible origin, 英语词源]
tangible (adj.): 1580s, "capable of being touched," from Middle French tangible and directly from Late Latin tangibilis "that may be touched," from Latin tangere "to touch" (see tangent (adj.)). Sense of "material" (as in tangible reward) is first recorded 1610s; that of "able to be realized or dealt with" is from 1709. Related: Tangibly.