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tangible [tangible 词源字典]: tangible: [16] Tangible means literally ‘touchable’. It comes via French tangible from late Latin tangibilis, a derivative of Latin tangere ‘touch’. Other English words from this source include tangent [16], etymologically a line ‘touching’ a circle. Its past participle tactus has contributed contact, intact, and tact, while the base from which it was formed, *tag-, has also produced contagion, contaminate, entire, and integrity.
=> contact, contagion, contaminate, intact, integrity, tact, task, taste, tax[tangible etymology, tangible origin, 英语词源]
intangible (adj.): 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.
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.
Tangier: port city of Morocco, Latin Tinge, said to be named for Tingis, daughter of Atlas, but probably from Semitic tigisis "harbor." In English often Tangiers, by influence of Algiers.
untangible (adj.): 1775, from un- (1) "not" + tangible (adj.).