icamo.

Headword: 
icamo.
Principal English Translation: 

as such, no; or, not like that; or, not for that reason (an adverb) (see Molina)

Alonso de Molina: 

icamo. por lo qual no. aduerbio.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 31v. col. 2. Thanks to Joe Campbell for providing the transcription.