yamaniliztli.

Headword: 
yamaniliztli.
Principal English Translation: 

softness (see Molina)

Orthographic Variants: 
iamanaliztli
Alonso de Molina: 

yamaniliztli. blandura.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 30v. col. 2. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

oacico in iamaniliztli, in totonillutl = softness, warmth arrives (a metaphor for the feeling of spring) (16th-c. central Mexico)
John F. Schwaller, "The Pre-Hispanic Poetics of Sahagún's Psalmodia christiana," in Psalms in the Early Modern World, eds. Linda Phyllis Austern, Kari Boyd McBride, and David L. Orvis (London: Ashgate, 2011), 321.