a wooden pulpit, or a tunnel (?), or a pipe (see Molina)
Orthographic Variants:
quauhcomitl
Alonso de Molina:
quauhcomitl. pulpito de madera, o tonel, pipote o pipa. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 86v. col. 1. Thanks to Joe Campbell for providing the transcription.