to measure going straight, or properly, correctly (see Molina)
Orthographic Variants:
melauaca tamachiua
Alonso de Molina:
melauaca tamachiua. nitla. (pret. onitlamelauacatamachiuh) medir derecho. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 55r. col. 2. Thanks to Joe Campbell for providing the transcription.