something pertaining to the realm of the dead (see Karttunen); or hell (see Molina)
IPAspelling:
miktɬɑːnkɑyoːtɬ
Alonso de Molina:
mictlancayotl. cosa infernal, o del infierno. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 56r. col. 2. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
MICTLĀNCAYŌ-TL something pertaining to the realm of the dead / cosa infernal o del infierno (M) [(1)Cf.53V, (I)Rp.44]. C also gives the synonymous short form MICTLĀNYŌ-TL. See MICTLĀN-TLI, -YŌ . Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 147.