to meet or suddenly bump into someone without warning (see Molina; tentative English translation here by Stephanie Wood)
Alonso de Molina:
teca ninomotla. teca oninomotlac. encontrar o topetar con otro, no aduertiendo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 91v. col. 2. Thanks to Joe Campbell for providing the transcription.