英语词源字典 - 在线词源网站

basalt (n.)[basalt 词源字典]: c. 1600, from Late Latin basaltes, misspelling of Latin basanites "very hard stone," from Greek basanites "a species of slate used to test gold," from basanos "touchstone." Not connected with salt. Said by Pliny ["Historia," 36.58] to be an African word, perhaps Egyptian bauhan "slate." Any hard, very dark rock would do as a touchstone; the assayer compared the streak left by the alleged gold with that of real gold or baser metals. Hence Greek basanizein "to be put to the test, examined closely, cross-examined, to be put to torture."[basalt etymology, basalt origin, 英语词源]
cross-examination (n.): also cross examination; 1827, "an examination of a witness by the other side, to 'check' the effects of previous questioning," from cross (adj.) + examination. Related: Cross-examine (1660s).