to understand someone's intent, or what they intend to do (see Molina)
IPAspelling:
joːllohmɑti
Alonso de Molina:
yollomati. nite. (pret. oniteyolloma.) entender el intento que otro tiene, o loque pretende hazer. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 40r. col. 2. Thanks to Joe Campbell for providing the transcription.