Comments:VEWT 103, EDT 415. (< Iran., see TMN 3, 85-86?). Despite EDT, hardly derived from ček- 'to pull'. The controversy concerning the Iranian origin of the Turkic word vs. the Turkic origin of the Modern Persian one (see Doerfer, Clauson), should be probably resolved as follows: Old Persian ( = Av. cakuš- 'axe / hammer for throwing') > Pers. čakuš 'hammer'; but Pers. čekoč, čekoǯ are phonetically aberrant (see Horn 99) and should be regarded as Turkisms; Pers. čekuš is a mixed form. The source of Pers. čekoč is Turk. čeküč - a diminutive in -č for the form čekük. Turkic forms in -š (Khal. čäkkuš, Kirgh. čöküš, KKalp. šökkiš, possibly also Nogh. šökiš, Bashk. sükeš) may be iranisms. Turk. > Mong. čeküč (see Щербак 1997, 112).