eş: w:caja registradora, máquina registradora, w:Caja de ahorros, caja de ahorros, cajón
köken: Probably borrowed from Catalan caixa or Occitan caissa, from Latin capsa. (Latin /-ps-/ yields palatal outcomes in the latter two, but not in Spanish; cf. Latin ipse > Spanish ese, Catalan eixe.) Related to English case and cash and, more distantly, Spanish quijada. Cognate with Asturian and Aragonese caxa (“box”), French caisse (“box”), châsse (“case, reliquary”), Galician, Mirandese, and…
aile: caja alta, caja baja, caja boba, caja china, caja de ahorros, caja de amortización, caja de cambios, caja de caudales, caja de cerillas, caja de dientes
köken: From Old Galician-Portuguese poço, from Latin puteus, ultimately from Proto-Indo-European *paw- (“to strike”). Compare Galician pozo, Spanish pozo, Catalan pou, Occitan potz, French puits, Italian pozzo and Romanian puț.