antroxu is incorrectly written and it should be written as "ANTRUEJO" being its meaning:
Name Comun.m.se known as ANTRUEJO to the triad of Sunday, Monday and Tuesday of Carnival or shrovetide. It is an archaism. Is often used in the plural: " the 34 ANTRUEJOS; as '' carnivals ''. Preceding Ash Wednesday, day as well its Latin Etymology implies: " introitus 34, '' entroido '' and then '' entruejo '' before the current ANTRUEJO by dissimilation. ( Entrance of the lent ).