Etymology

From Ancient Greek περιχώρησις ‎(perikhṓrēsis, “going round, rotation”), from περιχωρέω ‎(perikhōréō), from περί ‎(perí, “around”) + χωρέω ‎(khōréō, “go forward, travel”), because the relationship between the three members of the Trinity was described by early Christians as an eternal interpenetrating circulation.