to ignite charcoal (see Molina); to burn something, to set fire to something (see Karttunen)
IPAspelling:
ʃoːtɬɑltiɑː
Alonso de Molina:
xotlaltia. nitla. (pret. onitlaxotlalti.) encender carbones. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 161v. col. 1. Thanks to Joe Campbell for providing the transcription.
Frances Karttunen:
XŌTLALTIĀ vt to burn something, to set fire to something / encender carbones (M), lo quema, lo enciende, lo prende (T) caus. XŌTLA.
XŌTLALTILIĀ applic. XŌTLALTIĀ.
XŌTLALTĪLŌ nonact. XŌTLALTIĀ. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 331.