cant

\ \ English has two separate words cant. The older, ‘oblique angle’ [14], originally meant ‘edge’, and appears to have come via Middle Low German kant or Middle Dutch cant, both meaning ‘edge’ or ‘corner’, from Vulgar Latin *canto, a descendant of Latin cantus ‘iron tyre’. which was probably of Celtic origin (Welsh cant means ‘rim’). The accusative case of the Vulgar Latin word, *cantōnem, was the source of English canton [16], originally ‘corner, section’, now ‘territorial division’; while its Italian descendant, canto, may be the source of Italian cantina ‘cellar’, from which English got canteen [18]. Cant ‘thieves’ jargon’ or ‘hypocritical talk’ [16] was probably originally a specific application of the Latin verb cantāre ‘sing’ (source also of English chant, canto, cantor, cantata, and canticle). It is usually assumed that the usage derives from an ironic transference of the singing of church congregations or choirs to the wheedling ‘song’ of beggars and (by association) thieves.

\ \ Cf.⇒ CANTEEN, CANTON; CANTATA, CANTOR, CHANT