It is an inflection of acristianar, back Christian. You mean convert to Christianity or convert to Catholicism. In Colombia it was also formerly used as synonymous with education, culture, civilize, referring to the transformation of a 'wild' Indian to be Catholic, and educated. To present the Christian doctrine or the Catholic faith. On the other hand, the current football jargon, it can mean play or behave like Cristiano Ronaldo.
