yollotlacuahuac.

Headword: 
yollotlacuahuac.
Principal English Translation: 

hardened, obstinate (see Molina)

Orthographic Variants: 
yollotlaquauac, yollotlaquahuac
Alonso de Molina: 

yollotlaquauac. endurecido desta manera.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 40v. col. 2. Thanks to Joe Campbell for providing the transcription.