The word abates is the present form of abatir in the second person singular.
See the full abatir conjugation

abatir

Por obediencia a un obispo que invitaba a los párrocos y a sus vicarios a llevar una vida común, junto con los abates Brunello y Guiol hace voto de vivir en común para santificar a la juventud.
Out of obedience to the bishop who was urging the parish priests and their assistant priests to live a common life, along with Abbé Brunello and Guiol, they made a vow to live together in order to sanctify the youth.
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