spasm, stiffness, cramp (see Molina)
uapauiztli. pasmo, enuaramiento, o calambre. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 155r. col. 1. Thanks to Joe Campbell for providing the transcription.