the state of being covered with shade (see Molina)
IPAspelling:
tɬɑjɑkɑlwiːlli
Alonso de Molina:
tlayacalhuilli. cubierto con sombra. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 120v. col. 2. Thanks to Joe Campbell for providing the transcription.