z ... c It is one of the groups of expressive sound formed by non-labial consonant plus velar consonant or palatal ch . It is found in numerous words for some of which possible etymologies are given. In all of them there is the idea of ??a dry blow or a hard thing capable of producing it. Chanco, collide, choclo, choco, zanca, plinth, chuqueta, chump, clog. T ... c, t ... ch, t ... g, z ... q. V. also for similar groups with the second labial consonant s ... p, t ... p, z ... p .