to card, to sweep, to weed; and, more figuratively, to remove the bad from the good
Drawing from Sullivan, Peterson suggests a figurative meaning of "lead the way" or "to precede," and therefore "could refer to events that initiate, such as to birth or to ancestry."
xochpana, xitlacujcuj, chico, tlanavac xitlavica, xitlateca = sweep; clean; arrange, order things (central Mexico, sixteenth-century)
tochpanaz in vncan otlaqualoc = thou art to sweep the place where there has been eating (central Mexico, sixteenth century)
Auh ynin xuchimilli huel coochpanazque ypan tlatozque yn teteuhcti yehica ca yn iquac nican ualmohuica totlaçotatzitzinhuan padresme yc namico yn xuchitzintli yhuan yn tlachichihualo yn tlaqualneci yn teupan = Y dichas huertas se han de cuidar [sic] para las flores a la iglesia y para los Padres (Tetepango, Hidalgo, 1586)