"wedge-shaped," 1810, from Latin cuneatus, past participle of cuneare "to make wedge-shaped," from cuneus "a wedge, wedge-shaped thing," which is of unknown origin. Related: Cuneately.
1530s, in architecture and masonry, "cornerstone, external solid angle," a variant spelling of coin (n.); in early use also in other senses of that word, including "a wedge, wedge-like piece of stone, wood, etc."
1670s, "wedge-shaped," from French cunéiforme (16c.), from Latin cuneus "a wedge, wedge-shaped thing," which is of unknown origin, + French -forme (see form (n.)). German physician and traveler Engelbert Kämpfer (1681-1716) first applied the word to characters in ancient Middle Eastern inscriptions made with wedge-shaped writing tools; in English this sense is attested from 1818. As a noun, "cuneiform writing," by 1862.
c. 1300, "a wedge, a wedge-shaped piece used for some purpose," from Old French coing (12c.) "a wedge; stamp; piece of money;" usually "corner, angle," from Latin cuneus "a wedge," which is of unknown origin.
The die for stamping metal was wedge-shaped, and by late 14c. the English word came to mean "thing stamped, piece of metal converted into money by being impressed with official marks or characters" (a sense that already had developed in Old French). Meaning "coined money collectively, specie" is from late 14c.
Compare quoin, which split off from this word 16c., taking the architectural sense. Modern French coin is "corner, angle, nook."
The custom of striking coins as money began in western Asia Minor in 7c. B.C.E.; Greek tradition and Herodotus credit the Lydians with being first to make and use coins of silver and gold. Coin-operated (adj.), of machinery, is attested from 1890. Coin collector is attested from 1795.
c. 1300, clete "a wedge," from Old English *cleat "a lump," from West Germanic *klaut "firm lump" (source also of Middle Low German klot, klute, Middle Dutch cloot, Dutch kloot, Old High German kloz, German kloß "clod, dumpling").
In Middle English, a wedge of wood bolted to a spar, etc., to keep it from slipping (late 14c.). Meaning "thin metal plate fastened under a shoe, etc." (originally to preserve the sole) is from c. 1825, originally a dialect word. The athletic cleat, for gripping, is attested from 1904.