check

\ \ There are two distinct words check in English, although by very involved pathways they are related. Check ‘verify’ [14] is originally a chess term meaning ‘threaten the king’. It comes from Old French eschequier, a derivative of the noun eschec (source also of English chess), which goes back via Vulgar Latin *scaccus and Arabic shāh to Persian shāh ‘king’ (whence also, of course, English shah). (Checkmate [14] comes via Old French eschec mat from Persian shāh māt ‘the king is left helpless’; the second element turns up again in mat or matt ‘lustreless’.) From the very specific chess sense there developed more general applications such as ‘attack’, ‘arrest’, ‘stop’, ‘restrict’, and ‘verify’. Among these in the 18th century was ‘token used as a counterfoil for verifying something, such as an amount’. As check this survives mainly in American English (as in ‘hat-check’), but in the specific financial sense of ‘written money order’ it was transformed in British English into cheque, perhaps under the influence of exchequer. Check ‘pattern of squares’ [14] is probably short for chequer, which in turn is a reduced form of exchequer, a word derived ultimately from Vulgar Latin *scaccus ‘check’.

\ \ Cf.⇒ CHEQUE, CHESS, EXCHEQUER