to put something quite visible (or that looks good) atop a hut (see Molina)
Orthographic Variants:
quauh imolhuia
Alonso de Molina:
quauh imolhuia. nitla. (pret. onitlaquauhimolhui.) poner alguna cosa que parezca bien encima dela casa de paja. 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.