crownyoudaoicibaDictYouDict
crown: [12] Crowns appear to have been named essentially from their circular shape. The word’s ultimate source, Greek korónē, simply meant ‘something curved’ (it came from the adjective korōnos ‘curved’, which was a relative of Latin curvus ‘curved’). Latin borrowed it as corōna ‘circular garland’, and passed it on via Old French corone and Anglo-Norman corune to English.

Latin also derived a verb from it, corōnāre, which ultimately became the English verb crown and also, of course, formed the basis of English coronation [14]. Other English descendants of Latin corōna (which itself became an English word in the 16th century) are the two diminutives coronet [15] and corolla [17] (source of corollary), coroner [14] (originally an ‘officer of the crown’), and coronary.

The use of crown for certain coins (based of course on their being stamped with the figure of a crown) dates in English from the 14th century; it is also reflected in such coin names as Swedish krona and Danish and Norwegian krone.
=> corollary, coronation, coroner, coronet, curve
deskyoudaoicibaDictYouDict
desk: [14] Desk, disc, dish, and dais – strange bedfellows semantically – form a little gang of words going back ultimately, via Latin discus, to Greek dískos ‘quoit’. Desk seems perhaps the least likely descendant of ‘quoit’, but it came about like this: Latin discus was used metaphorically, on the basis of its circular shape, for a ‘tray’ or ‘platter, dish’; and when such a tray was set on legs, it became a table. (German tisch ‘table’ comes directly from Vulgar Latin in this sense.) By the time English acquired it from medieval Latin it seems already to have developed the specialized meaning ‘table for writing or reading on’.
=> dais, disc, dish
fanyoudaoicibaDictYouDict
fan: English has two words fan. By far the older [OE] came from Latin vannus; it originally meant ‘device for winnowing grain’, and its now familiar sense ‘handheld device for creating a cooling draught’ did not develop until the 16th century. Its characteristic semicircular shape gave rise to the term fanlight [19] (since applied to a rectangular window above a door). Fan ‘supporter’ is short for fanatic. There is a one-off example of its use in the 17th century, in New news from Bedlam 1682, but the origins of the modern word were in late 19th-century America, where it was used for sports supporters.