to seal in wax or to bathe something with wax (see Molina)
IPAspelling:
ʃiːkohkwitɬɑɑːltiɑ
Alonso de Molina:
xicocuitlaaltia. nitla. (pret. onitlaxicocuitlaalti.) encerar, o bañar algo con cera. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 159r. col. 1. Thanks to Joe Campbell for providing the transcription.