cracker-jack (n.)youdaoicibaDictYouDict[cracker-jack 词源字典]
also crackerjack, "something excellent," 1893, U.S. colloquialism, apparently a fanciful construction, earliest use in reference to racing horses. The caramel-coated popcorn-and-peanuts confection was said to have been introduced at the World's Columbian Exposition (1893). Supposedly a salesman gave it the name when he tasted some and said, "That's a cracker-jack," using the then-popular expression. The name was trademarked 1896. The "Prize in Every Box" was introduced 1912.
"Your brother Bob is traveling, isn't he?"
"Yep. He's with one of the big racing teams. I tell you, he's a cracker-jack! Wins a bushel of diamonds and gold cups every week."
["Life," Aug. 1, 1895]
[cracker-jack etymology, cracker-jack origin, 英语词源]
credenza (n.)youdaoicibaDictYouDict
1883, "an Italian sideboard," from Italian credenza, literally "belief, credit," from Medieval Latin credentia (see credence).

The same evolution that produced this sense in Italian also worked on the English word credence, which in Middle English also meant "act or process of testing the nature or character of food before serving it as a precaution against poison," a former practice in some royal or noble households. Because of that, in medieval times it also meant "a side-table or side-board on which the food was placed to be tasted before serving;" hence, in later use, "a cupboard or cabinet for the display of plate, etc." These senses fell away in English, and the modern furniture piece, which begins to be mentioned in domestic interiors from c. 1920, took its name from Italian, perhaps as a more elegant word than homely sideboard.
taste (v.)youdaoicibaDictYouDict
c. 1300, "to touch, to handle," from Old French taster "to taste, sample by mouth; enjoy" (13c.), earlier "to feel, touch, pat, stroke" (12c., Modern French tâter), from Vulgar Latin *tastare, apparently an alteration (perhaps by influence of gustare) of taxtare, a frequentative form of Latin taxare "evaluate, handle" (see tax (v.)). Meaning "to take a little food or drink" is from c. 1300; that of "to perceive by sense of taste" is recorded from mid-14c. Of substances, "to have a certain taste or flavor," it is attested from 1550s (replaced native smack (v.3) in this sense). For another PIE root in this sense, see gusto.
The Hindus recognized six principal varieties of taste with sixty-three possible mixtures ... the Greeks eight .... These included the four that are now regarded as fundamental, namely 'sweet,' 'bitter,' 'acid,' 'salt.' ... The others were 'pungent' (Gk. drimys, Skt. katuka-), 'astringent' (Gk. stryphnos, Skt. kasaya-), and, for the Greeks, 'rough, harsh' (austeros), 'oily, greasy' (liparos), with the occasional addition of 'winy' (oinodes). [Buck]
Sense of "to know by experience" is from 1520s. Related: Tasted; tasting. Taste buds is from 1879; also taste goblets.