tlecomitl.

Headword: 
tlecomitl.
Principal English Translation: 

a fire pit; a hearth; or, a crucible for melting gold (see Karttunen)

IPAspelling: 
tɬekoːmitɬ
Alonso de Molina: 

tlecomitl. crisol para fundir oro.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 147r. col. 1. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

TLECŌM(I)-TL possessed form: -TLECŌN fire pit, hearth, crucible / crisol para fundir oro (M), hornilla, fogón, (Z), hornillo (Z), [(3)Zp.60,69,223]. Z also has the variant TLECŌN without an absolutive suffix. See TLE-TL, CŌM(I)-TL.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 307.