prefix used in adding digits to larger numbers in the Nahuatl vigesimal number system and, plus (see Karttunen)
IPAspelling:
om
Frances Karttunen:
OM- prefix used in adding digits to larger numbers in the Nahuatl vigesimal number system and, plus / y, más (K) Despite the vowel length discrepancy, this appears to be related to both ŌME 'two' and OC 'another, again.' Regular nasal assimilation gives this the form ON- with numbers beginning with a nonlabial consonant. See ŌME, OC. Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 178.