one who widens something narrow, one who expands things or lets them out (see Molina)
IPAspelling:
tɬɑpɑtɬɑːwki
Alonso de Molina:
tlapatlauhqui. ensanchador tal. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 131r. col. 2. Thanks to Joe Campbell for providing the transcription.