a pacifier, a person who makes peace among people who are angry with each other (see Molina)
Alonso de Molina:
teicniuhtlani. pacificador, o el que haze amigos alos que estan reñidos. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 94r. col. 2. Thanks to Joe Campbell for providing the transcription.