it is still raining, the rain is not letting up; to rain endlessly (see Molina)
Orthographic Variants:
aoc onquiza inquiauitl, aoc onquiza in quiahuitl
Alonso de Molina:
aoc onquiza inquiauitl. no cessar de llouer. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 6v. col. 1. Thanks to Joe Campbell for providing the transcription.